# Intervall vs RoundFlow

The clearest difference is in-app purchases: Intervall at none against RoundFlow's 3. RoundFlow's advantage is update cadence (every 11 days vs monthly). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. RoundFlow sells 3 in-app purchases, starting at $2.99 per month. Intervall asks for nothing beyond the download.

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

Intervall ships an update monthly, RoundFlow every 11 days. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Intervall | RoundFlow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/intervall/id6760841694/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/roundflow-interval-timer/id6785911960/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 11 days** |
| Monetization | **Free** | Freemium |
| Size | 4 MB | 11 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Ruben Musca](https://appshunter.io/developer/1885574171) | [Zakaria Elkassmi](https://appshunter.io/developer/6785544936) |

## What reviewers say

### Intervall

[App page](https://appshunter.io/ios/app/intervall/id6760841694)

Create and run custom interval training routines with a clear, legible timer. This app syncs with Apple Watch to display heart rate and control workouts, and can save data to Apple Health.

**Highlights:** Custom interval workouts, Save and reuse workouts, Large, readable timer, Apple Watch mirroring, Watch controls, Live heart rate display, Apple Health integration

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


### 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 Intervall free?

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

### Is RoundFlow free?

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

### Which has better reviews, Intervall or RoundFlow?

Intervall and RoundFlow are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do Intervall or RoundFlow have ads?

Neither Intervall nor RoundFlow shows ads.

### Which is updated more often, Intervall or RoundFlow?

Intervall ships an update monthly, and RoundFlow every 11 days. Most recently, Intervall was updated on October 24, 2026 and RoundFlow on October 10, 2026.

---

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