# Gymboss Interval Timer vs TimerNinja

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.

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.

## The numbers

| Metric | Gymboss Interval Timer | TimerNinja |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (797 ratings)](https://appshunter.io/ios/app/gymboss-interval-timer/id500887448/reviews)** | [4.4 (8 ratings)](https://appshunter.io/ios/app/timerninja-activity-timers/id1591804917/reviews) |
| Number of ratings | **797** | 8 |
| Positive reviews | 36.4% of reviews | **83.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 23 MB | 11 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Gymboss LLC](https://appshunter.io/developer/894157662) | [Heftii, Inc.](https://appshunter.io/developer/1588613002) |

## What reviewers say

### Gymboss Interval Timer

[App page](https://appshunter.io/ios/app/gymboss-interval-timer/id500887448)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gymboss Premium Yearly | $1.99 | per year |
| Remove Ads | $0.99 | one-time |
| Sound and Color Bundle | $0.99 | one-time |

**What reviewers like**

- 🚀 Simple yet effective
- 🚀 Perfect gym partner
- 🚀 Grad App
- 🚀 Great
- 🚀 Simple easy to plan and workout

**What reviewers complain about**

- 🐛 Clear data
- 🐛 Glitchy
- 🐛 Another buggy update
- 🐛 Landscape / portrait bugs
- 🐛 Sagging under bugs

**Reported bugs**

- 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

**Requested features**

- 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


### TimerNinja

[App page](https://appshunter.io/ios/app/timerninja-activity-timers/id1591804917)

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.

**Highlights:** 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

**Features:** Family Sharing, Apple Watch app, SharePlay

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TimerNinja+ Monthly | $2.99 | per month |
| TimerNinja+ Family Monthly | $3.99 | per month |
| TimerNinja+ Yearly | $9.99 | per year |
| TimerNinja+ Family Yearly | $14.99 | per year |


## Frequently asked questions

### Is Gymboss Interval Timer free?

Gymboss Interval Timer is free to download, with in-app purchases available.

### Is TimerNinja free?

TimerNinja is free to download, with in-app purchases available.

### Which has better reviews, Gymboss Interval Timer or TimerNinja?

Gymboss Interval Timer is rated higher. Gymboss Interval Timer averages 4.7 out of 5 from 797 ratings, while TimerNinja averages 4.4 from 8 ratings.

### Do Gymboss Interval Timer or TimerNinja have ads?

Neither Gymboss Interval Timer nor TimerNinja shows ads.

### Which is updated more often, Gymboss Interval Timer or TimerNinja?

Gymboss Interval Timer ships an update every 5 weeks, and TimerNinja every 3 weeks. Most recently, Gymboss Interval Timer was updated on September 24, 2026 and TimerNinja on September 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*