# Seconds Interval Timer vs 12 Minute Athlete HIIT Timer

The clearest difference is in-app purchases: 12 Minute Athlete HIIT Timer at none against Seconds Interval Timer's 1. 12 Minute Athlete HIIT Timer also leads on rating (4.9 vs 4.7) and review sentiment (84% vs 74%). Seconds Interval Timer's advantage is ratings volume (24K vs 31) and update cadence (monthly vs every 4 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Seconds Interval Timer sells 1 one-off in-app purchase. 12 Minute Athlete HIIT Timer asks for nothing beyond the download.

12 Minute Athlete HIIT Timer holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: Seconds Interval Timer has 24K ratings behind it against 31, so its average is the more settled of the two. Written reviews point the same way: 74% of Seconds Interval Timer's written reviews are positive against 84% of 12 Minute Athlete HIIT Timer's.

Seconds Interval Timer ships an update monthly, 12 Minute Athlete HIIT Timer every 4 months. Both last shipped on October 20, 2026.

## The numbers

| Metric | Seconds Interval Timer | 12 Minute Athlete HIIT Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (24K ratings)](https://appshunter.io/ios/app/seconds-interval-timer/id475816966/reviews) | **[4.9 (31 ratings)](https://appshunter.io/ios/app/12-minute-athlete-hiit-timer/id673973596/reviews)** |
| Number of ratings | **24K** | 31 |
| Positive reviews | 74.5% of reviews | **84.4% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Free with in-app purchases | Freemium |
| Size | 95 MB | 3 MB |
| Requires iOS | 18.0 | **7.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Runloop Ltd](https://appshunter.io/developer/325563420) | [12 Minute Athlete](https://appshunter.io/developer/665678343) |

## What reviewers say

### Seconds Interval Timer

[App page](https://appshunter.io/ios/app/seconds-interval-timer/id475816966)

This app provides a versatile interval timer for various workout types like Tabata, HIIT, and circuit training. It features a clear, full-screen display, customizable alerts, and background operation. Users can also utilize a stopwatch and countdown timer, with integration for Apple Health.

**Highlights:** Full-screen colored display, Templates for HIIT, Tabata, Circuit Training, Voice and audio alerts, Music assignment per interval, Background operation, Apple Health integration, Stopwatch and countdown timer

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced Version | $7.99 | one-time |

**What reviewers like**

- 🚀 Great workout app
- 👍 Customizable and user-friendly
- 🔒 Reliable and stable
- 💡 Versatile for various workouts
- 👍 Easy to create and edit timers

**What reviewers complain about**

- 🐛 Occasional audio issues
- 🔍 Limited Apple Watch integration
- 💰 Paid version required for full functionality
- 🕰️ Time-consuming to set up complex workouts

**Reported bugs**

- Timer sometimes stops working unexpectedly
- Issues with restoring purchases on new devices

**Requested features**

- Ability to change beep/alert volume independently
- Option to delay transition between intervals
- Sync workouts across devices
- More preset workout templates
- Heart rate monitoring integration


### 12 Minute Athlete HIIT Timer

[App page](https://appshunter.io/ios/app/12-minute-athlete-hiit-timer/id673973596)

This app provides a programmable interval timer and stopwatch for various workout types, including HIIT and bodyweight exercises. It offers features like saving favorite timers, playing your own music, and sharing workouts. An upgrade unlocks a large library of guided HIIT workouts with exercise demonstrations.

**Highlights:** Programmable interval timer, Save favorite interval timers, Intuitive and easy-to-use design, Play your own music during workouts, Share workouts on social media, Library of guided HIIT workouts (paid), Exercise instructions and videos (paid)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Seconds Interval Timer free?

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

### Is 12 Minute Athlete HIIT Timer free?

12 Minute Athlete HIIT Timer is free to download, with no in-app purchases.

### Which has better reviews, Seconds Interval Timer or 12 Minute Athlete HIIT Timer?

12 Minute Athlete HIIT Timer is rated higher. Seconds Interval Timer averages 4.7 out of 5 from 24K ratings, while 12 Minute Athlete HIIT Timer averages 4.9 from 31 ratings.

### Do Seconds Interval Timer or 12 Minute Athlete HIIT Timer have ads?

Neither Seconds Interval Timer nor 12 Minute Athlete HIIT Timer shows ads.

### Which is updated more often, Seconds Interval Timer or 12 Minute Athlete HIIT Timer?

Seconds Interval Timer ships an update monthly, and 12 Minute Athlete HIIT Timer every 4 months. Most recently, Seconds Interval Timer was updated on October 20, 2026 and 12 Minute Athlete HIIT Timer on October 20, 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.*