# Custom Interval Timers vs Harlen

The clearest difference is ads: Harlen at none against Custom Interval Timers's shown. Harlen also leads on update cadence (every 11 days vs every 4 months) and monetization model (free vs ad-supported). Custom Interval Timers's advantage is ratings volume (14 vs 2). On price, rating, review sentiment and in-app purchases 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 Custom Interval Timers against 5.0 for Harlen. That said, the two scores are not equally well evidenced: Custom Interval Timers has 14 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Custom Interval Timers ships an update every 4 months, Harlen every 11 days. The most recent releases landed on October 29, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Custom Interval Timers | Harlen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (14 ratings)](https://appshunter.io/ios/app/custom-interval-timers/id1552160706/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/harlen/id6774843017/reviews) |
| Number of ratings | **14** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 11 days** |
| Monetization | Ad-supported | **Free** |
| Size | 40 MB | 36 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Alex Rich](https://appshunter.io/developer/1030627712) | [DANIEL VINH NGUYEN](https://appshunter.io/developer/6774843019) |

## What reviewers say

### Custom Interval Timers

[App page](https://appshunter.io/ios/app/custom-interval-timers/id1552160706)

Design personalized interval timers for workouts or productivity. Its intuitive editor allows for custom flows with various settings like countdowns and personalized interfaces. Offers light/dark modes and an option to disable ads.

**Highlights:** Customizable interval flows, Intuitive timer editor, Count up or down timers, Personalized running interface, Light/dark mode, Ad-free option

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

**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 Custom Interval Timers free?

Custom Interval Timers 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, Custom Interval Timers or Harlen?

Custom Interval Timers and Harlen are both rated 5.0 out of 5 on the App Store, from 14 and 2 ratings respectively.

### Do Custom Interval Timers or Harlen have ads?

Custom Interval Timers shows ads; Harlen does not.

### Which is updated more often, Custom Interval Timers or Harlen?

Custom Interval Timers ships an update every 4 months, and Harlen every 11 days. Most recently, Custom Interval Timers was updated on October 29, 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.*