## 3 Results
### Application Domains  
Based on the analysis of the included articles, the following application domains were considered: (i) requirements and development platforms; (ii) accessibility; (iii) localization; (iv) mobility assistance; (v) health conditions monitoring; (vi) promotion of healthy lifestyles; and (vii) data analytics. Table 3 presents the classification of the 28 included articles.  
\begin{table}
\begin{tabular}{p{113.8 pt} p{113.8 pt} p{113.8 pt}} \hline \hline
**Application Domains** & **Reference** & **Title** & **Year** \\ \hline Requirements and development platforms & [68] & _Towards ambient assisted cities and citizens._ & 2013 \\  & [76] & _GAWA—manager for accessibility wavfinding apps._ & 2017 \\  & [89] & _Age and the city: the case of smart mobility._ & 2020 \\ \hline Accessibility & [71] & _A service-oriented approach to crowdsensing for accessible smart mobility scenarios._ & 2016 \\  & [83] & _loE accessible bus stop: an initial concept._ & 2018 \\ \hline Localization & [72] & _A genetic-based localization algorithm for elderly people in smart cities._ & 2016 \\  & [81] & _OminamoriNet: an outdoor positioning system based on Wi-SUIN FAN network._ & 2018 \\  & [82] & _GPS trajectories based personalized safe geofence for elders with dementia._ & 2018 \\ \hline Mobility assistance & [69] & _DisAssist: An Internet of Things and Mobile Communications platform for Disabled Parking Space Management._ & 2013 \\  & [70] & _On combining crowdsourcing, sensing and open data for an accessible smart city._ & 2014 \\  & [86] & _Smart mobility for seniors through the urban connector._ & 2019 \\  & [91] & _Beyond walking: improving urban mobility equity in the age of information._ & 2020 \\  & [95] & _Towards a collaborative model to assist people with disabilities and the elderly people in smart assistive cities._ & 2021 \\ \hline Health conditions monitoring & [73] & _An architecture for combining open data with sensors’ data for effective prevention of MCI and frailty in elderly people._ & 2017 \\  & [77] & _Definition of technological solutions based on the internet of things and smart cities paradigms for active and healthy ageing through recreation._ & 2018 \\  & [84] & _Remote and non-invasive monitoring of elderly in a smart city context._ & 2018 \\  & [94] & _Wearable biosensor and hotspot analysis-based framework to detect stress hotspots for advancing elderly’s mobility._ & 2020 \\ \hline Promotion of healthy lifestyles & [75] & _Healthy routes in the smart city: a context-aware mobile recommender._ & 2017 \\  & [78] & _The Smart City Active Mobile Phone Intervention (SCAMPI) study to promote physical activity through active transportation in healthy adults: a study protocol for a randomized controlled trial._ & 2018 \\  & [79] & _Meet Smartwalk, smart cities for active seniors._ & 2018 \\  & [80] & _Smartwalk: personas and scenarios definition and functional requirements._ & 2018 \\  & [85] & _Customized walk paths for the elderly._ & 2019 \\  & [87] & _Smartwalk mobile—a context-aware m-health app for promoting physical activity among the elderly._ & 2019 \\  & [88] & _Supporting better physical activity in a smart city: a framework for suggesting and supervising walking paths._ & 2019 \\  & [89] & _User perception of a smartphone app to promote physical activity through active transportation: inductive quantitative content analysis within the Smart City Active Mobile Phone Intervention (SCAMPI) study._ & 2020 \\ Data analytics & [74] & _Identifying points of interest for elderly in Singapore through mobile crowdsensing._ & 2017 \\  & [90] & _Analysis of the temporal characteristics of the elderly traveling by bus using smart card data._ & 2020 \\  & [92] & _Classification of users’ transportation modalities in real conditions._ & 2020 \\ \hline \hline \end{tabular}
\end{table}
Table 3: Classification of the included articles.