# Seconds Pro Interval Timer vs HIIT (Watch) Timer

The clearest difference is rating: Seconds Pro Interval Timer at 4.8 against HIIT (Watch) Timer's 4.2. Seconds Pro Interval Timer also leads on ratings volume (12K vs 12) and update cadence (fortnightly vs every 2 months). HIIT (Watch) Timer's advantage is price ($3.99 vs $7.99) and iOS requirement (16.0 vs 18.0). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

Seconds Pro Interval Timer costs $7.99 and HIIT (Watch) Timer $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Seconds Pro Interval Timer holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Seconds Pro Interval Timer has 12K ratings behind it against 12, so its average is the more settled of the two. Written reviews split almost evenly too, at 80% and 80% positive.

Seconds Pro Interval Timer ships an update fortnightly, HIIT (Watch) Timer every 2 months. The most recent releases landed on September 24, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Seconds Pro Interval Timer | HIIT (Watch) Timer |
| --- | --- | --- |
| Price | $7.99 | **$3.99** |
| Rating | **[4.8 (12K ratings)](https://appshunter.io/ios/app/seconds-pro-interval-timer/id363978811/reviews)** | [4.2 (12 ratings)](https://appshunter.io/ios/app/hiit-watch-timer/id1234961483/reviews) |
| Number of ratings | **12K** | 12 |
| Positive reviews | 79.9% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Paid | Paid |
| Best chart rank | **#10** | — |
| Size | 94 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 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


### 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 Pro Interval Timer free?

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

### Is HIIT (Watch) Timer free?

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

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

Seconds Pro Interval Timer is rated higher. Seconds Pro Interval Timer averages 4.8 out of 5 from 12K ratings, while HIIT (Watch) Timer averages 4.2 from 12 ratings.

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

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

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

Seconds Pro Interval Timer ships an update fortnightly, and HIIT (Watch) Timer every 2 months. Most recently, Seconds Pro Interval Timer was updated on September 24, 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.*