# Interval Timer vs Harlen

The clearest difference is iOS requirement: Harlen at 15.1 against Interval Timer's 17.6. On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Interval Timer against 5.0 for Harlen. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Interval Timer ships an update every 2 weeks, Harlen every 11 days. The most recent releases landed on October 14, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Interval Timer | Harlen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/interval-timer-timetotrain/id6757983634/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/harlen/id6774843017/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 11 days** |
| Monetization | Free | Free |
| Size | 2 MB | 36 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Danila Dundukov](https://appshunter.io/developer/1776675659) | [DANIEL VINH NGUYEN](https://appshunter.io/developer/6774843019) |

## What reviewers say

### Interval Timer

[App page](https://appshunter.io/ios/app/interval-timer-timetotrain/id6757983634)

This app provides a precise interval timer for high-intensity interval training (HIIT), Tabata, and circuit workouts. It features customizable intervals, smart audio cues, and a clear countdown display to keep users focused during intense training sessions.

**Highlights:** Customizable work and rest intervals, Built-in Tabata and HIIT presets, Smart audio and haptic feedback, Large countdown display, Workout history and statistics, Adjustable rounds and sets

**Features:** macOS Compatibility

**In-app purchases:** none


### Harlen

[App page](https://appshunter.io/ios/app/harlen/id6774843017)

This app allows athletes to securely connect with their coach, granting access to wearable and health data. Athletes can view their connection status and recent metrics like heart rate, sleep, and steps directly on their coach's dashboard.

**Highlights:** Secure coach linking, Wearable data sync, Health metric sharing, Consent management, Athlete dashboard view

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

**In-app purchases:** none


## Frequently asked questions

### Is Interval Timer free?

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

### Is Harlen free?

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

### Which has better reviews, Interval Timer or Harlen?

Interval Timer and Harlen are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do Interval Timer or Harlen have ads?

Neither Interval Timer nor Harlen shows ads.

### Which is updated more often, Interval Timer or Harlen?

Interval Timer ships an update every 2 weeks, and Harlen every 11 days. Most recently, Interval Timer was updated on October 14, 2026 and Harlen on October 17, 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.*