# IntervalTimer - Workout Timer — Exercise and rest timer app > Exercise and rest timer app (iPhone/iPad app by naoki otsu.) - Source: https://appshunter.io/ios/app/intervaltimer-workout-timer/id6761044639 (this page in markdown: same URL + `.md`) - Developer: [naoki otsu](https://appshunter.io/developer/1082476153) - Category: Health & Fitness, Utilities - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 15.1 · 52 MB - Languages: American English, Czech, Danish, Dutch, French (France), German (Germany), Hindi, Hungarian, Indonesian, Italian and 14 more - Released: 2026-03-26 - Data updated: 2026-08-31 - User reviews in markdown: https://appshunter.io/ios/app/intervaltimer-workout-timer/id6761044639/reviews.md ## What is IntervalTimer? A powerful app to create and start interval timers that repeat exercise and rest periods. Perfect for weight training, stretching, Pomodoro timers, and many other activities. Packed with features including unlimited tabs, custom durations, one-tap start and stop, dark mode, biometric authentication, and more. ■ Create Interval Timers Create and start timers with your preferred number of sets and durations. ■ Organize Timers by Tab Create your own timers for each category with unlimited tabs. ■ Set Counts, Preparation, Workout, and Rest Freely configure repeat counts and durations, then start right away. ■ No Login Required Use it immediately without logging in. ■ Back and Forward Buttons Go back one step or skip ahead with a single tap. ■ Swipe to Switch Tabs Swipe left or right to switch tabs and start your timer instantly. ■ Reorder Tabs Rearrange tabs by swiping. ■ Custom Background Colors per Tab Change the background color for each tab individually. ■ Backup and Restore Save your data permanently to the cloud and restore it instantly on a new device. ■ Dark Mode Work comfortably with a beautiful dark mode that is easy on the eyes. ■ Biometric Authentication Enhance app security with biometric authentication. ■ Tab Notes Leave your favorite notes on tabs. ■ Complete Security Data is never sent externally and is completely protected within your device. ■ Offline Support Works even without an internet connection. ■ Terms of Use https://naokiotsu.com/term-of-use ■ Privacy Policy https://naokiotsu.com/privacy-policy Support info@naokiotsu.com ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Premium Edition | $4.99 | one-time | ## Version history (last 5 releases) ### 2.22.0 — 2026-08-13 - The latest version includes new features, bug fixes, and performance improvements. Thank you for always using our app. We will continue to develop it with the valuable feedback from everyone. If you have any requests or encounter any issues, please feel free to contact us through "Send Feedback" in the app settings or at info@naokiotsu.com. ### 2.21.1 — 2026-07-22 - The latest version includes new features, bug fixes, and performance improvements. Thank you for always using our app. We will continue to develop it with the valuable feedback from everyone. If you have any requests or encounter any issues, please feel free to contact us through "Send Feedback" in the app settings or at info@naokiotsu.com. ### 2.21.0 — 2026-07-20 - The latest version includes new features, bug fixes, and performance improvements. Thank you for always using our app. We will continue to develop it with the valuable feedback from everyone. If you have any requests or encounter any issues, please feel free to contact us through "Send Feedback" in the app settings or at info@naokiotsu.com. ### 2.17.0 — 2026-07-19 - The latest version includes new features, bug fixes, and performance improvements. Thank you for always using our app. We will continue to develop it with the valuable feedback from everyone. If you have any requests or encounter any issues, please feel free to contact us through "Send Feedback" in the app settings or at info@naokiotsu.com. ### 2.16.0 — 2026-07-13 - The latest version includes new features, bug fixes, and performance improvements. Thank you for always using our app. We will continue to develop it with the valuable feedback from everyone. If you have any requests or encounter any issues, please feel free to contact us through "Send Feedback" in the app settings or at info@naokiotsu.com. ## More apps by naoki otsu - [Check Calendar - Habit Tracker](https://appshunter.io/ios/app/check-calendar-habit-tracker/id1563837295) - [ToDo for Google - Manage tasks](https://appshunter.io/ios/app/todo-for-google-manage-tasks/id1616380685) - [Habit Check Calendar](https://appshunter.io/ios/app/habit-check-calendar/id1629764198) - [Daily Checklist - Today's Task](https://appshunter.io/ios/app/daily-checklist-todays-task/id1645796637) - [LinkList - Open Links Quickly](https://appshunter.io/ios/app/linklist-open-links-quickly/id1670836727) - [PrepChecklist - To-Do List](https://appshunter.io/ios/app/prepchecklist-to-do-list/id6463404844) All apps by naoki otsu: https://appshunter.io/developer/1082476153 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-31.*