# Custom Interval Timers vs ChainFlow

The clearest difference is in-app purchases: Custom Interval Timers at none against ChainFlow's 1. Custom Interval Timers also leads on ratings volume (14 vs 1) and iOS requirement (15.1 vs 17.0). ChainFlow's advantage is ads (none vs shown). On price, rating, update cadence and device support there is nothing between them.

Both are free to download. ChainFlow sells 1 one-off in-app purchase. Custom Interval Timers asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Custom Interval Timers against 5.0 for ChainFlow. That said, the two scores are not equally well evidenced: Custom Interval Timers has 14 ratings behind it against 1, so its average is the more settled of the two.

Custom Interval Timers ships an update every 4 months, ChainFlow every 2 months. The most recent releases landed on August 24, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | Custom Interval Timers | ChainFlow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (14 ratings)](https://appshunter.io/ios/app/custom-interval-timers/id1552160706/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/chainflow-interval-timer/id6755700190/reviews) |
| Number of ratings | **14** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | **Ad-supported** | Freemium |
| Size | 40 MB | 22 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alex Rich](https://appshunter.io/developer/1030627712) | [Michael Ebako-Hodgson](https://appshunter.io/developer/1855675493) |

## 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


### ChainFlow

[App page](https://appshunter.io/ios/app/chainflow-interval-timer/id6755700190)

Create highly customized interval timers for any routine, from HIIT workouts to study sessions. Set unique work and rest periods for each segment, with clear audio cues and a distraction-free interface. Save your routines for easy access and hands-free operation.

**Highlights:** Custom interval chaining, Adjustable work/rest times per interval, Clear audio cues, Hands-free operation, Screen-off functionality, Routine saving, Dark interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ChainFlow Pro | $4.99 | one-time |


## Frequently asked questions

### Is Custom Interval Timers free?

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

### Is ChainFlow free?

ChainFlow is free to download, with in-app purchases available.

### Which has better reviews, Custom Interval Timers or ChainFlow?

Custom Interval Timers and ChainFlow are both rated 5.0 out of 5 on the App Store, from 14 and 1 ratings respectively.

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

Custom Interval Timers shows ads; ChainFlow does not.

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

Custom Interval Timers ships an update every 4 months, and ChainFlow every 2 months. Most recently, Custom Interval Timers was updated on August 24, 2026 and ChainFlow on September 3, 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.*