# Seconds Pro Interval Timer vs OpenHIIT

The clearest difference is price: OpenHIIT at Free against Seconds Pro Interval Timer's $7.99. OpenHIIT also leads on review sentiment (100% vs 80%) and rating (5.0 vs 4.8). Seconds Pro Interval Timer's advantage is ratings volume (12K vs 8) and chart position (#10 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.

OpenHIIT is free to download; Seconds Pro Interval Timer costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OpenHIIT holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Seconds Pro Interval Timer has 12K ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 80% of Seconds Pro Interval Timer's written reviews are positive against 100% of OpenHIIT's.

Seconds Pro Interval Timer ships an update fortnightly, OpenHIIT monthly. The most recent releases landed on September 26, 2026 and August 14, 2026 respectively.

## The numbers

| Metric | Seconds Pro Interval Timer | OpenHIIT |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | [4.8 (12K ratings)](https://appshunter.io/ios/app/seconds-pro-interval-timer/id363978811/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/openhiit/id6459617819/reviews)** |
| Number of ratings | **12K** | 8 |
| Positive reviews | 79.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Paid | **Free** |
| Best chart rank | **#10** | — |
| Size | 94 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 Pro Interval Timer

[App page](https://appshunter.io/ios/app/seconds-pro-interval-timer/id363978811)

**Currently charting:** #10 Top Paid · Health & Fitness (US App Store)

This interval timer app is designed for high-intensity interval training (HIIT), Tabata, and circuit training workouts. It features a large, color-coded display, customizable interval names, and background operation. It also integrates with Apple Health to track your fitness data.

**Highlights:** Full screen colored display, Templates for HIIT, Tabata, Circuit Training, Speaks interval names and provides warnings, Assign music per interval, Runs in background, Share interval timers, Apple Health integration

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

**In-app purchases:** none

**What reviewers like**

- ⭐ Great updates
- 🤖 Amazing voice prompts
- 👍 Easy to use
- 🎨 Highly customizable
- 🔧 Versatile for various workouts

**What reviewers complain about**

- 🐛 Occasional bugs and glitches
- 🔌 Music volume issues
- 🔍 Complicated setup for some features
- 🌐 Sync/sharing issues between devices
- 🔇 Inconsistent audio cues

**Reported bugs**

- Intervals randomly pausing or skipping
- Music volume issues when launching the app
- Inconsistent audio cues and countdown
- Sync issues between devices

**Requested features**

- Ability to lock Apple Watch screen
- Option to see more than just the next exercise
- Fractional time settings (e.g. 7.74 seconds)
- More voice/audio customization options
- Improved sync between iPhone and iPad


### 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 Pro Interval Timer free?

Seconds Pro Interval Timer costs $7.99, with no in-app purchases.

### Is OpenHIIT free?

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

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

OpenHIIT is rated higher. Seconds Pro Interval Timer averages 4.8 out of 5 from 12K ratings, while OpenHIIT averages 5.0 from 8 ratings.

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

Neither Seconds Pro Interval Timer nor OpenHIIT shows ads.

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

Seconds Pro Interval Timer ships an update fortnightly, and OpenHIIT monthly. Most recently, Seconds Pro Interval Timer was updated on September 26, 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.*