# Seconds Pro Interval Timer vs Exercise HIIT Interval Timer

The clearest difference is price: Exercise HIIT Interval Timer at Free against Seconds Pro Interval Timer's $7.99. Exercise HIIT Interval Timer also leads on review sentiment (100% vs 80%) and iOS requirement (16.0 vs 18.0). Seconds Pro Interval Timer's advantage is in-app purchases (none vs 2) and update cadence (fortnightly vs every 3 months). On ads and device support there is nothing between them.

Exercise HIIT Interval Timer is free to download; Seconds Pro Interval Timer costs $7.99 up front. Exercise HIIT Interval Timer sells 2 in-app purchases, starting at $0.99 per month. Seconds Pro Interval Timer asks for nothing beyond the download.

Seconds Pro Interval Timer holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Seconds Pro Interval Timer has 12K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 80% of Seconds Pro Interval Timer's written reviews are positive against 100% of Exercise HIIT Interval Timer's, so the app with the better star average is not the one people write more warmly about.

Seconds Pro Interval Timer ships an update fortnightly, Exercise HIIT Interval Timer every 3 months. The most recent releases landed on September 24, 2026 and August 13, 2026 respectively.

## The numbers

| Metric | Seconds Pro Interval Timer | Exercise HIIT Interval Timer |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | **[4.8 (12K ratings)](https://appshunter.io/ios/app/seconds-pro-interval-timer/id363978811/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/exercise-hiit-interval-timer/id1595647110/reviews) |
| Number of ratings | **12K** | 2 |
| Positive reviews | 79.9% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | Paid | **Freemium** |
| Best chart rank | **#10** | — |
| Size | 94 MB | 5 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) | [Maxim Antonov](https://appshunter.io/developer/846051995) |

## 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


### Exercise HIIT Interval Timer

[App page](https://appshunter.io/ios/app/exercise-hiit-interval-timer/id1595647110)

Design and execute custom high-intensity interval training routines with this versatile workout timer. Tailor your sessions with adjustable work and rest periods, rounds, and exercise names. Track progress and stay motivated with audio cues and spoken announcements.

**Highlights:** Customizable workout routines, Adjustable work and rest intervals, Spoken exercise announcements, Audio cues for timing, Apple Watch companion app, Progress monitoring

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $0.99 | per month |
| Premium | $8.49 | per year |


## Frequently asked questions

### Is Seconds Pro Interval Timer free?

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

### Is Exercise HIIT Interval Timer free?

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

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

Seconds Pro Interval Timer is rated higher. Seconds Pro Interval Timer averages 4.8 out of 5 from 12K ratings, while Exercise HIIT Interval Timer averages 4.5 from 2 ratings.

### Do Seconds Pro Interval Timer or Exercise HIIT Interval Timer have ads?

Neither Seconds Pro Interval Timer nor Exercise HIIT Interval Timer shows ads.

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

Seconds Pro Interval Timer ships an update fortnightly, and Exercise HIIT Interval Timer every 3 months. Most recently, Seconds Pro Interval Timer was updated on September 24, 2026 and Exercise HIIT Interval Timer on August 13, 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.*