International Journal of Interactive Mobile Technologies (iJIM) – eISSN: 1865-7923 – Vol. 14, No. 20, 2020 Paper—Mobile Apps in Retail: Determinants of Consumer Acceptance – A Systematic Review Mobile Apps in Retail: Determinants of Consumer Acceptance – A Systematic Review https://doi.org/10.3991/ijim.v14i20.18273 Atilla Wohllebe (*), Phyllis Dirrler Szent István University, Kaposvár, Hungary atilla.wohllebe@gmail.com Szilárd Podruzsik Corvinus University of Budapest, Budapest, Hungary Abstract—With the increasing relevance of smartphones, more and more companies are trying to use mobile apps for their business purposes. At the same time, the digital transformation and online trade are putting increasing pressure on the stationary retail trade. Many retailers are therefore looking for ways to use mobile apps to attract new customers or retain existing ones. With the growing number of mobile apps in the app marketplaces, the sustainable loyalty of app users is becoming an increasing challenge. For retailers, the ques- tion arises as to which determinants influence consumer acceptance of mobile apps in retail. From an initial 44,800 search results at Google Scholar, 18 scien- tific papers are analyzed in a qualitative synthesis by means of a systematic review based on the PRISMA schema. In general, perceived value, practical benefits and user-friendliness are identified as determinants. In addition, the importance of linking the mobile app to the stationary POS and the function of mobile apps in retail more as digital shopping assistants and less as online stores is highlighted. The retailer who publishes the app itself also plays an important role in the consumer acceptance of the app. Keywords—Mobile Apps, Retail, Consumer Acceptance, Consumer Adoption, Systematic Review 1 Introduction The spread of mobile devices or smartphones and the importance of these devices for accessing the Internet has been growing steadily for many years since the first smartphone was sold [1], [2]. At the same time, the importance of mobile applica- tions, or mobile apps for short, is also growing: Apps now exist for practically all areas of life and are used by consumers [3], for example for vacations, education or in the health sector [4]–[8]. As a result, more and more companies are looking for ways to use mobile apps commercially [9]. Because mobile apps can also help to retain existing customers [10]–[12], commercial hopes are correspondingly high [13]. iJIM ‒ Vol. 14, No. 20, 2020 153 https://doi.org/10.3991/ijim.v14i20.18273%0d mailto:atilla.wohllebe@gmail.com Paper—Mobile Apps in Retail: Determinants of Consumer Acceptance – A Systematic Review Parallel to these developments, stationary retail is under increasing pressure. Available retail space is still rising [14], while rents remain constant [15]. Following the in some cases significant declines in sales in the past [16], sales productivity in terms of sales per square meter of sales space is recovering slowly [17]. At the same time, the relevance of online retailing as a share of total retail sales is steadily growing steadily [18]. For the design of their local shopping experience, customers therefore increasingly expect technological innovation, such as self-scanning options, digital advertising for local offers or virtual opportunities to try on clothing based on augmented reality technologies [19]. Mobile apps could play a decisive role here, for example in pay- ment processing or by checking the availability of goods online [3], [20]. At the same time, however, research from other contexts also shows that the development of mo- bile apps does not always match the expectations of potential users [21]. Scientific research has already frequently examined and demonstrated the use of mobile apps in the retail industry. For example, customers of a retailer who have in- stalled the app generate more sales on average [22]. The actual use of the app plays an important role here, because customers who enjoy using a retailer's app are more likely to recommend it to others [23]. Previous research in the app context in general has already comprehensively inves- tigated the factors that determine consumer acceptance of mobile apps. For example, in addition to consumer loyalty to a brand [24], [25], a functional, attractive design also plays an important role [26]. Further research results indicate that the perception mobile apps also seems to be determined by socio-economic background of people [27]. Furthermore, with regard to mobile apps, it is generally emphasized that actual added value, such as time savings, drives consumer acceptance [28]. This raises the question of what is causing consumers to adopt and actually use mobile apps in retail in particular. Using a systematic review this paper therefore investigates the determinants of consumer acceptance of mobile apps in retail. 2 Methodology For the systematic review, the authors use the scientific database Google Scholar on August 12, 2020. The systematic review is methodically structured according to the PRISMA scheme [29]. Table 1 shows the procedure for searching and selecting literature as a review pro- tocol. 154 http://www.i-jim.org Paper—Mobile Apps in Retail: Determinants of Consumer Acceptance – A Systematic Review Table 1. Review Protocol Review Question “What drives consumer acceptance of mobile app in retail?” Literature Search Source: Google Scholar Search term: “mobile apps retail” Sorting By relevance Filtering Exclusion of patents and citations Years: 2016 – 2020 Exclusions By position in list: Only first 10 pages / 100 results By title: Thematic reference given in the title in the broadest sense, excluding e.g. entries focusing on mobile banking or gastronomy as well as mainly technological concepts By abstract: Exclusion of entries with no reference to mobile apps in retail or with no recognizable reference to consumers and customers Evaluation Full-text assessment: Inclusion of only those articles with specific references to the consumer acceptance of mobile apps in retail The total of 44,800 search results for "mobile apps retail" will be reduced to 38,500 after exclusion of patents and citations. The subsequent restriction to results since 2016 or later reduces the results to a total of 23,200. The restriction to the last five calendar years is made because the research field of mobile apps is still relatively new and technological developments are fast. Sorted by relevance (at Google Scholar's discretion), the first 100 search results are then screened. The search results, which have probably been updated again and again in the meantime, can be called up at the in Ref. [30] web address. Figure 1 shows the subsequent procedure according to the PRISMA statement [29]. Fig. 1. PRISMA Statement (source: [29]) iJIM ‒ Vol. 14, No. 20, 2020 155 Paper—Mobile Apps in Retail: Determinants of Consumer Acceptance – A Systematic Review In the first screening, only those items that have a clear link to the retail trade are included in the next step, the full-text assessment for eligibility. This does not include articles on mobile banking [31] and purely technological concepts in the broadest sense [32]. Also articles from other business areas such as gastronomy have not been included [33]. In the subsequent full-text assessment, a further 11 of 29 articles are excluded. Ex- amples of excluded articles are: • An article that examines how a retailer in China can use the WeChat app as a mo- bile instant messaging application to build customer relationships. As this is not the retailer's own app, but the WeChat app is used as a third-party provider, the article is excluded [34]. • An article that examines web and app as access routes to the retail market in India. Because it is only a two-page case study, this article is also excluded [35]. • An article on mobile payment technologies in retail is also excluded: The article focuses on mobile payment and not on retail [36]. After the full-text assessment and dropping eleven articles, 18 journal articles, books, book chapters and articles from conference proceedings are included in the qualitative synthesis. 3 Results In the following, the articles are summarized in the context of the qualitative syn- thesis and references to the question of consumer acceptance factors are established. The review increases in chronological order from year to year. Papers published in the same year increase in alphabetical order, according to the surname of the first author. A study comparing technological innovations in retail via apps or via stationary installed devices comes to the conclusion, that previously piloted technical solutions have experienced rather moderate acceptance. Based on an online survey of consum- ers, the authors emphasize the importance of emotions. Also, the importance of joy trying out new solutions is pointed out. At the same time, they also leave open what could drive consumer acceptance of mobile apps in retail in the long term beyond the mere joy of innovation [37]. In a qualitative research with 29 consumers, Ref. [38] investigates the willingness of consumers to change their shopping behavior using mobile technologies. The authors consider this question for Italy and in particular against the background of click and collect procedures or so-called pick-up boutiques. They come to the conclu- sion that consumers would like to see more use of mobile apps as shopping aids. The stronger connection of mobile technologies with the physical store on site plays a strong role for consumer acceptance and thus for the long-term success of mobile apps in retail. Ref. [39] investigate the motivation for app engagement in the context of a fashion retail app by means of 18 qualitative interviews within the framework of explorative research. They distinguish between hedonic and utilitarian motivations. As a result, 156 http://www.i-jim.org Paper—Mobile Apps in Retail: Determinants of Consumer Acceptance – A Systematic Review they conclude that efficiency and convenience are the most important utilitarian moti- vators. They also stress the importance of personalized service and convenient opera- tion processes. Their statement is important for the long-term consumer acceptance of mobile apps in retail: The authors clearly distinguish themselves from the industry's usual focus on experiential interactions in this context. Using a quantitative analysis of 272 shopping apps and a survey, Ref. [40] investi- gates how the use of mobile augmented reality apps in retail can create added value for customers. The author finds that augmented reality technologies basically have the potential to improve the retail shopping experience and thus contribute to consumer acceptance. By surveying 630 U.S. consumers and processing a SEM and an ANOVA, Ref. [41] investigates augmented reality apps in fashion retail in the USA. In particular, the impact of trust in AR applications on the use of these applications and visiting a retail store is investigated. As a result, it is concluded that novelty is positively related to trust and trust is positively related to the intention to visit a retail store. With this research, the author shows an important connection how mobile apps can help retail- ers to increase store visits. Therefore, they emphasize engaging with existing app users. Consequently, trust in an app not only contributes to app usage but also to the increase of store visits. A survey of 146 consumers using smartphones in retail stores was conducted to find differences by product category and gender. In particular, the authors find that high involvement product categories and young men are particularly affine to using smartphones and mobile apps in retail stores. This means that consumer acceptance of mobile apps in retail stores also depends on the context in which they are used [42]. Ref. [43] investigate the impact of mobile apps in retail and their impact on cus- tomer satisfaction in the multichannel environment. On the basis of collected user data they find out that hedonic and functional aspects have a positive effect on cus- tomer satisfaction. They also point out that the congruence between retailer image and mobile app leads to higher customer satisfaction. With regard to the long-term ac- ceptance of mobile apps in retail by consumers, the importance of the image of a retailer is to be emphasized. Besides, hedonic and functional aspects play an im- portant role. Investigating the antecedents and consequences of mobile app engagement, the au- thors of Ref. [44] find that time convenience, interactivity and compatibility have a positive influence on mobile app engagement and can lead to a strengthening of self- branded connections. They confirm the importance of time convenience and practical benefits for long-term app usage by consumers. A similar conclusion was reached by the authors of Ref. [45]: The authors examine the influence of consumer experiences with mobile retail apps on the intentions of use and recommendation. They also take into account channel preferences and purchasing behavior. They refer to retailers who sell via an app as well as via a store. They show that the perceived ease of use in particular has an effect on channel preferences and purchasing behavior as well as on future purchasing intentions. Their results underline the importance of a user-friendly implementation on consumer acceptance. iJIM ‒ Vol. 14, No. 20, 2020 157 Paper—Mobile Apps in Retail: Determinants of Consumer Acceptance – A Systematic Review Trust, privacy, learning and relaxation features also play an important role. This can be derived from the work of Ref. [46]: The authors compare models for the use and continuous use of mobile apps in retail and use the unified theory of acceptance and use of technology. Examining mobile technologies as drivers of digital change in retail, a review of existing scientific literature and other popular sources conclude that digital channels such as mobile apps should not be understood as a mere distribution channel. Rather, the authors emphasize the importance of embedding them in a holistically thought-out multichannel strategy. In this respect, consumer expectations of mobile apps in retail should not only be considered from the perspective of a distribution channel. This might not be sufficient for long-term consumer acceptance [47]. Using eye tracking and scan path visualizations, the authors of Ref. [48] capture consumer shopping behavior on smartphones in fashion retail. They identify various usability issues. Their work also emphasizes the importance of a user-friendly appli- cation and a development that is strongly oriented towards the needs and habits of the users. This can ensure the user acceptance. Understanding the intention to reuse as an expression of long-term consumer ac- ceptance, Ref. [49] demonstrates the importance of mobile app atmospherics. The authors develop and test a model to define the relationships between hedonic shop- ping orientation, consumer need for mobile apps atmospherics, entertainment gratifi- cation, mobile irritation and the intention to reuse mobile apps. In the context of ap- parel shopping, they develop a model, which they test with 216 US mobile shoppers between 18 and 34: The mobile app atmospherics plays a central role in the intention to reuse mobile apps. In the context of the disruption of traditional retail through mobile technologies, Ref. [50] presents various building blocks for the use of mobile in retail. They state that the exclusive adaptation of known e-commerce systems and functionalities is not sufficient to meet the needs of mobile digitization of stationary retail from the cus- tomer's perspective. Their results are decisive for the question of consumer acceptance of mobile apps in retail, since a mobile app of a retailer must offer more than just a shopping functionality. A similar conclusion can be reached on the basis of a study that uses a cross- section survey to examine the impact of e-service quality on customer loyalty, using Zara and Mango as examples. The authors emphasize the importance of mobile app design, but also show that return handling policies and price offerings are important for customer loyalty. Their work is interesting for consumer acceptance in so far as, in addition to the app itself, the services of a retailer are also important to strengthen the long-term use of mobile apps by retailers [51]. With a view to food retailing, the authors of Ref. [52] examine how mobile apps affect customer loyalty in this area. The authors work out that the perceived value of an app by users positively contributes to cognitive and conative loyalty. With a view to long-term user acceptance, this finding is central in that it emphasizes the importance of actual added value for the customer. In a grocery store with the example of fresh salmon, the use of mobile apps as a tool to support the purchase decision is examined. The study uses a conjoint experi- 158 http://www.i-jim.org Paper—Mobile Apps in Retail: Determinants of Consumer Acceptance – A Systematic Review ment with 90 participants. The authors find out that quality indicators of other cus- tomers as well as individual offers in particular contribute to the usefulness of an app and thus contribute to a higher consumer acceptance [53]. The last paper considered here shows the antecedents and consequences of con- sumer confidence in mobile retails apps in India. Using a SEM and data from a survey of 567 participants, the authors show that previous consumer experience, the useful- ness of an app, the ease of use and quality of the app, and the reputation and offline presence of an organization have a positive impact on consumer trust in mobile apps. They emphasize the central role of trust in the adoption of apps in retail. At the same time, they emphasize that the app alone is not enough, but that the retailer also con- tributes significantly to consumer acceptance of mobile apps in retail [54]. 4 Summary and Discussion For this systematic review on the question, which determinants affect the consumer acceptance of mobile apps in retail, a total of 18 were filtered out and analyzed for the qualitative synthesis on the basis of initial 44,800 papers. First of all, it should be emphasized that the acceptance of a mobile app in retail always depends on the specific context in which it is used - product categories with a high level of involvement are particularly suitable for the use of mobile apps [42]. In summary, the acceptance of mobile apps in retail is primarily determined by expected efficiency gains, practical benefits and user-friendliness [39], [44], [48]. The perceived value of an app plays a major role, especially for long-term consumer acceptance [52]. The role of trust and respect for privacy are also described as deter- minants [41], [46], [54] and can even contribute to increasing store visits [41]. These results do not particularly differ from previous findings on consumer acceptance of mobile apps in general. From a functional point of view, mobile apps in retail should not only represent a distribution channel (in the sense of m-commerce), but should rather be understood and developed as digital shopping assistants for in-store shopping. A mobile app as a pure online shopping tool without any reference to the stationary point of sale is not sufficient for long-term consumer acceptance [38], [47], [50]. It is also noteworthy that the retailer itself, as a brand and with the services it of- fers, apparently also has a major influence on consumer acceptance of the mobile app it offers, as is repeatedly emphasized [43], [51], [54]. Regarding the limitation it is to be noted that Google Scholar is a comprehensive, but also quite broad database. In particular when sorting the search results by rele- vance, Google Scholar's definition was used. The search engine's understanding of relevance is not necessarily consistent with other bibliographic methods and is not completely transparent. Regarding the remaining research gaps, two aspects in particular are identified. First, there seem to be different user typologies in the use of mobile apps in retail, as a certain joy of trying new innovations identified by Ref. [37] or the use of an app as an online store or digital shopping assistant outlined by Ref. [47], [50] suggest. Second- iJIM ‒ Vol. 14, No. 20, 2020 159 Paper—Mobile Apps in Retail: Determinants of Consumer Acceptance – A Systematic Review ly, the question arises as to what specific functionality retailers are trying to use to meet this consumer demand. 5 Conclusion The aim of this paper was to present current scientific findings on the determinants of consumer acceptance of mobile apps in retail by means of a systematic review. Using the scientific database Google Scholar a total of 18 current journal articles, articles from conference proceedings and book chapters were identified in a qualita- tive synthesis. It can be stated that many determinants in the case of mobile apps in retail are simi- lar to those of mobile apps in general: User friendliness, added value for the user and user trust in the app play essential role. In addition, the retailer offering the mobile app is particularly important for mobile apps in retail. The strength of their brand, a positive image and the service offered also have a positive impact on the acceptance of the mobile app. The functionality of the mobile app should be emphasized in particular: Consumers expect less of a sales channel in the sense of a mobile online store, but rather a digital shopping assistant that helps them with their local retail purchases. 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Popp, Eds. Wies- baden: Springer Fachmedien, 2020, pp. 635–654. [53] A. Fagerstrøm, N. Eriksson, and V. Sigurdsson, “The Use of Mobile Apps to Facilitate Customers’ Choice-Making When Grocery Shopping,” in Smart Trends in Computing and Communications: Proceedings of SmartCom 2020, Singapore, 2020, pp. 39–47, https://doi.org/10.1007/978-981-15-5224-3_4. [54] A. K. Kaushik, G. Mohan, and V. Kumar, “Examining the Antecedents and Consequences of Customers’ Trust Toward Mobile Retail Apps in India,” Journal of Internet Commerce, vol. 19, no. 1, pp. 1–31, Jan. 2020, https://doi.org/10.1080/15332861.2019.1686333. 7 Authors Atilla Wohllebe is a PhD student at the Doctoral School in Management and Or- ganizational Sciences, Szent István University - Kaposvár Campus, Hungary. Living and working in Hamburg, Germany, he is engaged in research and professional work on consumer interactions with smartphone apps. Atilla Wohllebe holds a B.A. in Business Administration and a M.Sc. in E-Commerce. Phyllis Dirrler lives in Hamburg, Germany, and conducts research in the fields of conflict management, aviation and digitalization. She is currently completing a PhD program at Szent István University - Kaposvár Campus, Hungary. Szilárd Podruzsik is an associate professor at Corvinus University of Budapest. He works at the Institute for the Development of Enterprises. He also works as a su- pervisor at Kaposvár University and Szent István University. He holds a PhD from the Budapest University of Economics. His research focus is on small and medium-sized enterprises, food production, consumption and their determinants. He has already published over eighty papers as an author or co-author and participated in several research projects as a leader or participant. Article submitted 2020-09-06. Resubmitted 2020-09-25. Final acceptance 2020-09-25. Final version published as submitted by the authors. 164 http://www.i-jim.org