# Seconds Interval Timer vs OpenHIIT

The clearest difference is in-app purchases: OpenHIIT at none against Seconds Interval Timer's 1. OpenHIIT also leads on review sentiment (100% vs 75%) and rating (5.0 vs 4.7). Seconds Interval Timer's advantage is ratings volume (24K vs 8). On price, update cadence, ads and device support there is nothing between them.

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

OpenHIIT holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Seconds Interval Timer has 24K ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 75% of Seconds Interval Timer's written reviews are positive against 100% of OpenHIIT's.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 25, 2026 and August 14, 2026 respectively.

## The numbers

| Metric | Seconds Interval Timer | OpenHIIT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (24K ratings)](https://appshunter.io/ios/app/seconds-interval-timer/id475816966/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/openhiit/id6459617819/reviews)** |
| Number of ratings | **24K** | 8 |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 95 MB | 26 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Runloop Ltd](https://appshunter.io/developer/325563420) | [Abigail Mabe](https://appshunter.io/developer/1701885217) |

## 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


### OpenHIIT

[App page](https://appshunter.io/ios/app/openhiit/id6459617819)

This open-source interval timer app helps optimize various activities like workouts, work sprints, and study sessions. It offers customizable timing, precise controls, and clear auditory and visual alerts to keep you motivated and on track. Users can also join a collaborative community to contribute to its development.

**Highlights:** Customizable interval timing, Precise and user-friendly controls, Auditory and visual alerts, Open-source community collaboration, Ad-free experience

**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 OpenHIIT free?

OpenHIIT is free to download, with no in-app purchases.

### Which has better reviews, Seconds Interval Timer or OpenHIIT?

OpenHIIT is rated higher. Seconds Interval Timer averages 4.7 out of 5 from 24K ratings, while OpenHIIT averages 5.0 from 8 ratings.

### Do Seconds Interval Timer or OpenHIIT have ads?

Neither Seconds Interval Timer nor OpenHIIT shows ads.

### Which is updated more often, Seconds Interval Timer or OpenHIIT?

Seconds Interval Timer ships an update monthly, and OpenHIIT monthly. Most recently, Seconds Interval Timer was updated on September 25, 2026 and OpenHIIT on August 14, 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.*