# ChainFlow vs Custom Interval Workout Timer

The clearest difference is ads: ChainFlow at none against Custom Interval Workout Timer's shown. Custom Interval Workout Timer's advantage is update cadence (every 3 weeks vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. ChainFlow sells 1 one-off in-app purchase and Custom Interval Workout Timer sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ChainFlow ships an update every 2 months, Custom Interval Workout Timer every 3 weeks. The most recent releases landed on September 17, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | ChainFlow | Custom Interval Workout Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/chainflow-interval-timer/id6755700190/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Freemium | — |
| Size | 22 MB | 7 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Michael Ebako-Hodgson](https://appshunter.io/developer/1855675493) | [Michael McGill apps llc](https://appshunter.io/developer/1874084552) |

## What reviewers say

### 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 |


### Custom Interval Workout Timer

[App page](https://appshunter.io/ios/app/custom-interval-workout-timer/id6759209042)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Yearly | $19.99 | per year |


## Frequently asked questions

### Is ChainFlow free?

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

### Is Custom Interval Workout Timer free?

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

### Do ChainFlow or Custom Interval Workout Timer have ads?

Custom Interval Workout Timer shows ads; ChainFlow does not.

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

ChainFlow ships an update every 2 months, and Custom Interval Workout Timer every 3 weeks. Most recently, ChainFlow was updated on September 17, 2026 and Custom Interval Workout Timer on September 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*