Table 1.

Attributes of the apps in the datasets.

Attribute description	Attribute of the apps from the Apple App Store	Attribute of the apps from the Google Play Store	Attribute used for
Unique identification	ID	ID	Identifying individual apps and preventing duplicates during data collection.
App name	Title	Title	Tokens, monograms, and bigrams
App summary	N/Aa	Summary	Tokens, monograms, and bigrams
App description	Description	Description	Tokens, monograms, bigrams, and number of characters (description length)
Release date	Released	Released	Tracking number of apps released over the years
App size	Size	Size	Average size of apps on each platform
Required operating system	Required_os	Android_2022	Most used versions of operating systems
Price of the app	Price	Price	Price of apps in INRb
Rating-score (ie, star-rating)	Score	Score	Average rating-scores
Number of reviews	Reviews	Reviews	Average number of reviews
App’s category	Category	Category	To select health and medical apps
Presence of in-app purchases	N/A	IAPc	Number of apps with in-app purchases
Number of ratings	N/A	Ratings	Average number of ratings
Number of installs (ie, downloads)	N/A	installs_2022	Average number of installs
All the languages the app is available in	Languagesd	—e	Distribution of languages in apps
Updated date	Updated	✓f	Tracking the number of apps updated over the years

^aN/A: not available.

^bINR: Indian national rupee.

^cIAP: in-app purchases.

^dApple App Store lists many languages (ie, those in which the app can be used) in the languages attribute of a given app.

^eGoogle Play Store does not have an attribute called languages. In both cases, for filtering apps based on language, we detected the language of the app description. This is illustrated in detail in Multimedia Appendix 1.

^fGoogle Play Store does not have the attribute for updated year at the time of data collection.