# THIM vs HIIT Interval Timer

The clearest difference is review sentiment: HIIT Interval Timer at 100% against THIM's 0%. HIIT Interval Timer also leads on update cadence (every 2 weeks vs every 2 months). THIM's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. HIIT Interval Timer sells 2 one-off in-app purchases. THIM asks for nothing beyond the download.

THIM ships an update every 2 months, HIIT Interval Timer every 2 weeks. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | THIM | HIIT Interval Timer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 96 MB | 107 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Re-Time Pty Ltd](https://appshunter.io/developer/637379603) | [tsyk-app](https://appshunter.io/developer/1586870924) |

## What reviewers say

### THIM

[App page](https://appshunter.io/ios/app/thim-sleep-ring/id1538264675)

This app helps you improve sleep quality through a unique conditioning program developed by a sleep scientist. It tracks sleep stages, offers power naps, and features a smart alarm to wake you from light sleep. Monitor your sleep efficiency with a score used in sleep clinics.

**Highlights:** Sleep conditioning program, Track sleep quality and stages, Accurate 10-minute power naps, Smart alarm for light sleep wake-ups, Sleep efficiency scoring, Community for sleep optimization

**Features:** macOS Compatibility

**In-app purchases:** none


### HIIT Interval Timer

[App page](https://appshunter.io/ios/app/hiit-interval-timer-tabata/id1586870922)

This interval training app offers customizable timers for various workout styles like HIIT, Tabata, EMOM, and AMRAP. It provides structured programs, progress tracking, and estimated calorie burn, with an optional one-time purchase for an ad-free experience and expanded features.

**Highlights:** Customizable interval timers, HIIT, Tabata, EMOM, AMRAP modes, Structured 4-week workout programs, Progress tracking and stats, Estimated calorie burn, Preset saving and scheduling, Sound effects and haptic feedback

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 7-day Trial | Free | one-time |
| HIIT Timer Pro | $4.99 | one-time |


## Frequently asked questions

### Is THIM free?

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

### Is HIIT Interval Timer free?

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

### Do THIM or HIIT Interval Timer have ads?

HIIT Interval Timer shows ads; THIM does not.

### Which is updated more often, THIM or HIIT Interval Timer?

THIM ships an update every 2 months, and HIIT Interval Timer every 2 weeks. Most recently, THIM was updated on November 3, 2026 and HIIT Interval Timer on November 7, 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.*