# Interval Flow vs Breathe Sync

The clearest difference is in-app purchases: Breathe Sync at none against Interval Flow's 1. Breathe Sync also leads on iOS requirement (13.0 vs 15.6). Interval Flow's advantage is update cadence (every 2 weeks vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. Interval Flow sells 1 one-off in-app purchase. Breathe Sync asks for nothing beyond the download.

Interval Flow ships an update every 2 weeks, Breathe Sync monthly. The most recent releases landed on September 23, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Interval Flow | Breathe Sync |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | — | Free |
| Size | 8 MB | 8 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tegyaan](https://appshunter.io/developer/1711584632) | [TESS SERVICES PTY LTD](https://appshunter.io/developer/1796512962) |

## What reviewers say

### Interval Flow

[App page](https://appshunter.io/ios/app/interval-flow/id6469113776)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Multiple Programs | $3.99 | one-time |


### Breathe Sync

[App page](https://appshunter.io/ios/app/breathe-sync/id6742041121)

This app offers guided breathing exercises to promote relaxation and stress relief. It features customizable patterns, visual cues, and optional voice guidance to suit individual needs. Perfect for daily mindfulness and improving sleep.

**Highlights:** Personalized breathing patterns, Customizable inhale/hold/exhale durations, Calming visual interface with themes, Optional voice guidance, Visual breathing animation, Flexible session control, Custom pattern creation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Interval Flow free?

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

### Is Breathe Sync free?

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

### Do Interval Flow or Breathe Sync have ads?

Neither Interval Flow nor Breathe Sync shows ads.

### Which is updated more often, Interval Flow or Breathe Sync?

Interval Flow ships an update every 2 weeks, and Breathe Sync monthly. Most recently, Interval Flow was updated on September 23, 2026 and Breathe Sync on September 26, 2026.

---

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