Gymboss Interval Timer vs TimerNinja
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gymboss Interval Timer
This app provides a customizable interval timer for various workouts, allowing users to set single or multiple work and rest periods. It offers extensive customization options for alarms, program saving, and display, ensuring a tailored timing experience for any fitness routine.
- Programmable interval timer
- Unlimited intervals and rounds
- Save and manage unlimited programs
- Visual, audible, and vibrate alarms
- Music access and dimming
- Customizable display and background
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The Gymboss Interval Timer app is a programmable interval timer perfect for any workout where timing is needed to time work and/or rest periods. You can time a single time interval, or multiple time intervals, and repeat them as many times as you wish. Perfect for running, HIIT, tabata, crossfit, home workouts, mma, boxing, weight lifting, stretching, or any other workout that requires timing. This app incorporates all of the recommendations we have received over the years from our users to bring you the best app possible. Thank you for your input!!! Customizable Features: - save programs to your iCloud Drive account - unlimited intervals - up to 99 rounds/repeats - unlimited saved programs - music access directly from the app - music dims for alarm - multiple alarm sounds - visual, audible, and vibrate alarm options - social sharing options - prevent sleep feature - screen lock - customizable, moving background colors - large, easy to read display - landscape mode option - set different alarms for each interval - change the end of program alarm - label activity names for each interval to be displayed - built in stopwatch - ability to make rounds box bigger or smaller - copy an entire program option Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
TimerNinja
Track time for workouts and productivity with versatile timer options. Supports Apple Watch integration, Apple Health recording, and SharePlay for synchronized challenges with friends. Offers customizable themes and multiple timer types.
- Multiple timer types (Stopwatch, Countdown, Intervals, EMOM, Pomodoro)
- Apple Watch standalone app and remote control
- Record workouts to Apple Health
- SharePlay for synchronized workouts with friends
- Customizable dark and light themes
- Standalone Apple Watch app
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TimerNinja is the simple, flexible interval timer for workouts, training sessions, and any other timed activity — on iPhone, iPad, Apple Watch, Apple TV, Mac, and Apple Vision Pro. TIMERS FOR EVERY ACTIVITY • Stopwatch — count up, with an optional time cap • Timer — a simple countdown • Intervals — work/rest rounds • Multi-interval — chain interval groups together • EMOM — Every Minute On the Minute • Tabata — 20 seconds on, 10 seconds off • Pomodoro — focus and break cycles (Plus) • Custom — build anything with nested, repeating intervals (Plus) YOUR TIMER, EVERYWHERE • Live Activities keep your timer on the Lock Screen and in the Dynamic Island • Start your favorite timers from Home Screen and Lock Screen widgets • Control Center controls let you start, pause, and resume without opening the app • Siri & Shortcuts: start any saved timer by voice, automate your routine, or put it on the Action Button on Apple Watch Ultra • Your saved timers show up in Spotlight search BUILT FOR APPLE WATCH • Run timers standalone on your watch, or use it as a remote control for the timer on your iPhone • Record workouts to Apple Health with heart rate and calories — just pick an activity type when you start • Watch-face complications and Smart Stack support put your timers one tap away ALWAYS IN SYNC • Saved timers sync automatically across your devices with iCloud • SharePlay keeps timers perfectly in sync with friends anywhere in the world — challenge them to a workout • Share any timer as a link; anyone can open it instantly, even without the app SOUNDS THAT CUT THROUGH • Clear countdown beeps, interval cues, and finish sounds • Spoken announcements that call out each interval by name (Plus) • Extra sound packs — Airhorn, Ruan, Taiko, and more (Plus) MADE TO BE GLANCED AT • A distraction-free full-screen timer you can read from across the gym • Beautiful light and dark themes for both the app and the timer screen • Localized into 11 languages TimerNinja is free to use. TimerNinja Plus unlocks the Pomodoro and Custom timer types, spoken announcements, and extra sound packs. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.timerninja.com/privacy
Screenshots
Verdict
The clearest difference is review sentiment: TimerNinja at 83% against Gymboss Interval Timer's 36%. TimerNinja also leads on device support (6 vs 3). Gymboss Interval Timer's advantage is ratings volume (797 vs 8) and rating (4.7 vs 4.4). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Gymboss Interval Timer sells 3 in-app purchases, starting at $1.99 per year and TimerNinja sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Gymboss Interval Timer holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: Gymboss Interval Timer has 797 ratings behind it against 8, so its average is the more settled of the two. Written reviews complicate that: 36% of Gymboss Interval Timer's written reviews are positive against 83% of TimerNinja's, so the app with the better star average is not the one people write more warmly about.
Gymboss Interval Timer ships an update every 5 weeks, TimerNinja every 3 weeks. The most recent releases landed on September 24, 2026 and September 8, 2026 respectively.
| Parameter | Gymboss Interval Timer | TimerNinja |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (797 ratings) — better | 4.4 (8 ratings) |
| Positive reviews | 36.4% of reviews | 83.3% of reviews — better |
| Number of ratings | 797 — better | 8 |
| Update frequency | Every 5 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro — better |
| Requires iOS | 15.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 23 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Gymboss LLC | Heftii, Inc. |
Customer experience
Gymboss Interval Timer
TimerNinja
Bugs and requests
Gymboss Interval Timer
Reported bugs
8 issues- Timer no longer beeps when screen is locked or app is in background
- Intervals disappear or get shuffled after updates
- Unable to save new workouts
- All workout sounds have gone
- Crashes when trying to edit intervals
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- Reordering of saved workouts
- Ads cover the timer screen
- Timer stops working when screen is locked or app is in background
Requested features
9 requests- Verbal prompts like a countdown "3-2-1 Go!" and "3-2-1 Rest"
- Ability to lock the screen
- Option to see what's coming next
- Workout block of 60/30/30 rather than just high and low
- Ability to start from partway through the sequence
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- Back and forward button to skip to the wanted element or go back during the sequence
- Different alarm sounds for each interval/color
- Countdown, CountUp feature
- Dark mode option
TimerNinja
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Gymboss Interval Timer
- Gymboss Premium Yearly$1.991 Year
- Remove Ads$0.99
- Sound and Color Bundle$0.99
TimerNinja
- TimerNinja+ Monthly$2.991 Month
- TimerNinja+ Family Monthly$3.991 Month
- TimerNinja+ Yearly$9.991 Year
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- TimerNinja+ Family Yearly$14.991 Year
Questions
Is Gymboss Interval Timer free?
Is TimerNinja free?
Which has better reviews, Gymboss Interval Timer or TimerNinja?
Do Gymboss Interval Timer or TimerNinja have ads?
Which is updated more often, Gymboss Interval Timer or TimerNinja?
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