# Timer | Interval vs RoundFlow

The clearest difference is iOS requirement: Timer | Interval at 15.1 against RoundFlow's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Timer | Interval sells 1 one-off in-app purchase and RoundFlow sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Timer | Interval ships an update every 10 days, RoundFlow weekly. The most recent releases landed on September 18, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Timer | Interval | RoundFlow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/roundflow-interval-timer/id6785911960/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | — | Freemium |
| Size | 44 MB | 11 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [MICAH JOHN WALKER](https://appshunter.io/developer/1877508805) | [Zakaria Elkassmi](https://appshunter.io/developer/6785544936) |

## What reviewers say

### Timer | Interval

[App page](https://appshunter.io/ios/app/timer-interval/id6759624277)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Timer \| Interval | $2.99 | one-time |


### RoundFlow

[App page](https://appshunter.io/ios/app/roundflow-interval-timer/id6785911960)

This app provides a customizable interval timer for various combat sports and fitness routines. It seamlessly integrates with music apps, allowing your playlist to continue uninterrupted during workouts. Features include coach voice prompts, combo calls, and workout tracking.

**Highlights:** Music integration with Spotify, Apple Music, YouTube Music, Customizable round, rest, and warm-up/cool-down timers, Recorded coach voice and combo callouts, Workout tracking with calendar and streaks, Apple Watch companion app with haptic feedback, Workout art generation for social sharing, Group session synchronization

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RoundFlow Pro (Monthly) | $2.99 | per month |
| RoundFlow Pro (Yearly) | $7.99 | per year |
| RoundFlow Pro (Lifetime) | $24.99 | one-time |


## Frequently asked questions

### Is Timer | Interval free?

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

### Is RoundFlow free?

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

### Do Timer | Interval or RoundFlow have ads?

Neither Timer | Interval nor RoundFlow shows ads.

### Which is updated more often, Timer | Interval or RoundFlow?

Timer | Interval ships an update every 10 days, and RoundFlow weekly. Most recently, Timer | Interval was updated on September 18, 2026 and RoundFlow on September 24, 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.*