# Seconds Interval Timer vs HIIT (Watch) Timer

The clearest difference is price: Seconds Interval Timer at Free against HIIT (Watch) Timer's $3.99. Seconds Interval Timer also leads on rating (4.7 vs 4.2) and ratings volume (24K vs 12). HIIT (Watch) Timer's advantage is in-app purchases (none vs 1) and iOS requirement (16.0 vs 18.0). On review sentiment, ads and device support there is nothing between them.

Seconds Interval Timer is free to download; HIIT (Watch) Timer costs $3.99 up front. Seconds Interval Timer sells 1 one-off in-app purchase. HIIT (Watch) Timer asks for nothing beyond the download.

Seconds Interval Timer holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Seconds Interval Timer has 24K ratings behind it against 12, so its average is the more settled of the two. Written reviews complicate that: 75% of Seconds Interval Timer's written reviews are positive against 80% of HIIT (Watch) Timer's, so the app with the better star average is not the one people write more warmly about.

Seconds Interval Timer ships an update monthly, HIIT (Watch) Timer every 2 months. The most recent releases landed on September 25, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Seconds Interval Timer | HIIT (Watch) Timer |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[4.7 (24K ratings)](https://appshunter.io/ios/app/seconds-interval-timer/id475816966/reviews)** | [4.2 (12 ratings)](https://appshunter.io/ios/app/hiit-watch-timer/id1234961483/reviews) |
| Number of ratings | **24K** | 12 |
| Positive reviews | 75.0% of reviews | **80.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 95 MB | 44 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Runloop Ltd](https://appshunter.io/developer/325563420) | [RhythmicWorks](https://appshunter.io/developer/977154427) |

## 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


### HIIT (Watch) Timer

[App page](https://appshunter.io/ios/app/hiit-watch-timer/id1234961483)

This app offers a straightforward interval timer designed for Apple Watch, iPhone, and iPad. It features a clean interface, live heart rate monitoring, haptic feedback, and detailed workout summaries, seamlessly integrating with the Health app.

**Highlights:** Apple Watch independent app, Live heart rate monitoring, Haptic feedback and audio alerts, Workout summary with calories and heart rate, Health app integration, Customizable intervals (warm-up, cooldown, rest), Complications for quick access

**Features:** macOS Compatibility, Apple Watch app

**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 HIIT (Watch) Timer free?

HIIT (Watch) Timer costs $3.99, with no in-app purchases.

### Which has better reviews, Seconds Interval Timer or HIIT (Watch) Timer?

Seconds Interval Timer is rated higher. Seconds Interval Timer averages 4.7 out of 5 from 24K ratings, while HIIT (Watch) Timer averages 4.2 from 12 ratings.

### Do Seconds Interval Timer or HIIT (Watch) Timer have ads?

Neither Seconds Interval Timer nor HIIT (Watch) Timer shows ads.

### Which is updated more often, Seconds Interval Timer or HIIT (Watch) Timer?

Seconds Interval Timer ships an update monthly, and HIIT (Watch) Timer every 2 months. Most recently, Seconds Interval Timer was updated on September 25, 2026 and HIIT (Watch) Timer on September 21, 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.*