# RoundFlow vs Shadow Box

The clearest difference is in-app purchases: Shadow Box at none against RoundFlow's 3. Shadow Box also leads on iOS requirement (15.1 vs 17.0). RoundFlow's advantage is update cadence (every 11 days vs monthly). On price, ads and device support there is nothing between them.

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

RoundFlow ships an update every 11 days, Shadow Box monthly. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | RoundFlow | Shadow Box |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/roundflow-interval-timer/id6785911960/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 11 days** | Monthly |
| Monetization | Freemium | — |
| Size | 11 MB | 149 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zakaria Elkassmi](https://appshunter.io/developer/6785544936) | [SALMAN AHMED](https://appshunter.io/developer/6794790206) |

## What reviewers say

### 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 |


### Shadow Box

[App page](https://appshunter.io/ios/app/shadow-box-boxing-coach/id6794892785)

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

**In-app purchases:** none


## Frequently asked questions

### Is RoundFlow free?

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

### Is Shadow Box free?

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

### Do RoundFlow or Shadow Box have ads?

Neither RoundFlow nor Shadow Box shows ads.

### Which is updated more often, RoundFlow or Shadow Box?

RoundFlow ships an update every 11 days, and Shadow Box monthly. Most recently, RoundFlow was updated on October 10, 2026 and Shadow Box on October 13, 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.*