{"assets":{"app_about":{"about_data":{"description":"Features include:

* Keep track of period, jam, and timeout times
* App will automatically keep track of the number of jams and the timeouts taken by both teams.
* Audio / visual / vibrate reminder when 10 seconds of the jam /period / timeout are remaining
* Option to hold overtime jams at the end of a bout.
* Team names can be customised
* Timer background can be customized. Add your League's logo, team photo, or any image you like.
* Preferences allow you to customize period, timeout, interval and jam time, reminder tone and/or vibrate, and to prevent accidental closure of the timer when pressing the back key
* App can prevent display from dimming / timing out during use.
* Remaining period time can be adjusted if necessary.
* Useful for practice sessions and scrimmages.
* Choose to automatically start jams or choose between starting jam or taking a timeout.","icon_cdn_path":{"32x32":"https://d1nxzqpcg2bym0.cloudfront.net/google_play/com.teanapps.jamtime/caa02450-fc04-11e6-9231-4f3aa4a67d76/32x32","64x64":"https://d1nxzqpcg2bym0.cloudfront.net/google_play/com.teanapps.jamtime/caa02450-fc04-11e6-9231-4f3aa4a67d76/64x64","128x128":"https://d1nxzqpcg2bym0.cloudfront.net/google_play/com.teanapps.jamtime/caa02450-fc04-11e6-9231-4f3aa4a67d76/128x128"},"primary_category_id":39,"publisher_url":"https://play.google.com/store/apps/developer?id=Tean+Apps","screenshot_urls":["https://play-lh.googleusercontent.com/vQbzkcZA2z74ORoaesFEK4VjcDBPnbMRJQNQ2D3bfyQ5splVjhE13SkU5uoWzRvMoXE","https://play-lh.googleusercontent.com/vcVH0zeUDUIbG__ZGQ1QOgImKNhrZgHo4sFm4vzzLBb7NkHaKjMwdGL5Iu54fW2BPAI","https://play-lh.googleusercontent.com/hOQQs18YA19ogjb6SwpjHROsvVaFI1mhUFbFGhPgdSONpNUJkPwf0hU0fZQ-j23E0A","https://play-lh.googleusercontent.com/TqXzEocJtVWpF_e5NXXMiHTo8m3nOGT8xIa3iDBz8mb2dx4rCENsAHiodppiMFcCNV0","https://play-lh.googleusercontent.com/00qx1gjZlgEoi1hpjm6v4QQ6LKw2qQvYuHirTZuH3MEk0es_TSZqBURhsARrvi9EtFY"],"name":"Jam Timer 4 Roller Derby","app_id":"com.teanapps.jamtime","category_ids":[39,99],"released_on":"2016-07-01","publisher_id":56436,"url":"https://play.google.com/store/apps/details?id=com.teanapps.jamtime","publisher_name":"Tean Apps","icon_url":"https://play-lh.googleusercontent.com/Xvtqr6vNx2f5bNgy3LevNSkl4OFiVL1EAmdm4A9vd-6MALVc05Kfokh93yAeHqIGYb4","price":2.99,"screenshot_cdn_paths":["https://d1nxzqpcg2bym0.cloudfront.net/google_play/com.teanapps.jamtime/9e8fd3d4-fc62-11eb-9649-5d5dd07841e5/640","https://d1nxzqpcg2bym0.cloudfront.net/google_play/com.teanapps.jamtime/00e13f5a-2a02-11ed-8fde-17da088ee575/640","https://d1nxzqpcg2bym0.cloudfront.net/google_play/com.teanapps.jamtime/b44a1670-2db9-11f1-bba2-e3bc7e8d30e2/640","https://d1nxzqpcg2bym0.cloudfront.net/google_play/com.teanapps.jamtime/01671904-2a02-11ed-9b64-454c71a89a83/640","https://d1nxzqpcg2bym0.cloudfront.net/google_play/com.teanapps.jamtime/01a80c52-2a02-11ed-af2b-1979d9902e20/640"],"avg_release_interval":null,"categories_list":[{"category_id":39,"category_name":"Applications","type":"primary","is_performance_available":false},{"category_id":99,"category_name":"Sports","type":"secondary","is_performance_available":true}],"iap_present":false,"ads_present":false,"subtitle":"An app to assist with the timing of jams and bouts in Roller Derby.","released_date_formatted":"Jul 01, 2016","released_on_dev_date_formatted":null},"ratings":{"total_ratings":null,"avg_rating":null,"ratings_breakdown":null},"versions":[{"version":"2.3.4","release_date":"2025-10-12","description":null,"app_id":"com.teanapps.jamtime","formatted_release_date":"Oct 12, 2025"},{"version":"2.3.3","release_date":"2025-10-10","description":"UI improvements.","app_id":"com.teanapps.jamtime","formatted_release_date":"Oct 10, 2025"},{"version":"2.3.2","release_date":"2025-10-06","description":"Bug fixes.
Refactoring.","app_id":"com.teanapps.jamtime","formatted_release_date":"Oct 06, 2025"},{"version":"2.3.1","release_date":"2025-10-04","description":"Additional timer fonts added.","app_id":"com.teanapps.jamtime","formatted_release_date":"Oct 04, 2025"},{"version":"2.3.0","release_date":"2025-09-21","description":"UI improvements.
Added functionality to choose multiple timer fonts.","app_id":"com.teanapps.jamtime","formatted_release_date":"Sep 21, 2025"},{"version":"2.2.19","release_date":"2025-09-16","description":"Improvements to timeout functionality.
Added functionality to manually edit the number of jams and team timeouts displayed.
Bug fixes.","app_id":"com.teanapps.jamtime","formatted_release_date":"Sep 16, 2025"},{"version":"2.2.18","release_date":"2025-09-16","description":"Improvements to timeout functionality.
Added functionality to manually edit the number of jams and team timeouts displayed.","app_id":"com.teanapps.jamtime","formatted_release_date":"Sep 16, 2025"},{"version":"2.2.17","release_date":"2025-09-09","description":"Preferences UI fixes and improvements.","app_id":"com.teanapps.jamtime","formatted_release_date":"Sep 09, 2025"},{"version":"2.2.15","release_date":"2025-09-08","description":"UI fixes and improvements.
Updates to help page.","app_id":"com.teanapps.jamtime","formatted_release_date":"Sep 08, 2025"},{"version":"2.2.14","release_date":"2025-09-06","description":"Redundant code removed.
Fixed issue where timeout not cancelled if user clicked outside of timeout dialog.","app_id":"com.teanapps.jamtime","formatted_release_date":"Sep 06, 2025"},{"version":"2.2.12","release_date":"2025-09-03","description":"Fix to stop timers "wobbling".
Fix to stop vibration/alert tone from blocking UI.","app_id":"com.teanapps.jamtime","formatted_release_date":"Sep 03, 2025"},{"version":"2.2.11","release_date":"2025-09-01","description":"Fixes to UI, compileSdkVersion updated to 35.","app_id":"com.teanapps.jamtime","formatted_release_date":"Sep 01, 2025"},{"version":"2.2.8","release_date":"2025-08-30","description":"Additional interval between jams added.
Can now select background color if no background image selected.
Target Sdk Version updated to 35.","app_id":"com.teanapps.jamtime","formatted_release_date":"Aug 30, 2025"},{"version":"2.2.6","release_date":"2025-08-29","description":"Small bug fixes and UI updates.","app_id":"com.teanapps.jamtime","formatted_release_date":"Aug 29, 2025"},{"version":"2.2.4","release_date":"2025-08-28","description":null,"app_id":"com.teanapps.jamtime","formatted_release_date":"Aug 28, 2025"},{"version":"2.2.3","release_date":"2023-09-16","description":"Updated androidx.fragment from 1.0.0 to 1.3.6
New higher res default background","app_id":"com.teanapps.jamtime","formatted_release_date":"Sep 16, 2023"},{"version":"2.2.1","release_date":"2019-02-13","description":"Added additional 45s option between jams","app_id":"com.teanapps.jamtime","formatted_release_date":"Feb 13, 2019"},{"version":"2.2.0","release_date":"2016-09-05","description":"Bug fix: deprecated MODE_WORLD_READABLE changed to MODE_PRIVATE to allow app to run on Nougat.","app_id":"com.teanapps.jamtime","formatted_release_date":"Sep 05, 2016"},{"version":"2.1.0","release_date":"2016-07-16","description":"Improvements to UI, and bug fixes.
New function to store any saved customization of team names and colors","app_id":"com.teanapps.jamtime","formatted_release_date":"Jul 16, 2016"},{"version":"2.0.0","release_date":"2016-07-01","description":"","app_id":"com.teanapps.jamtime","formatted_release_date":"Jul 01, 2016"}],"filters":{"store":"google_play"},"other_data":{"store_id":"com.teanapps.jamtime","file_size":0,"os_compatibility":"Android ","age_rating":"Everyone","languages_list":[],"permissions":[],"interactive_elements":[],"app_products":[],"privacy_url":"http://teanapps.com/privacy.aspx","url":"https://play.google.com/store/apps/details?id=com.teanapps.jamtime","store":"google_play"}}}}

Want data on your competitors?

Access download, revenue, engagement and user retention data for 7+ million apps in 60+ countries

Jam Timer 4 Roller Derby

Access download, revenue, engagement and user
retention data for 7+ million apps in 60+ countries