# Flow vs Ultradian

The clearest difference is rating: Flow at 4.8 against Ultradian's 3.3. Flow also leads on update cadence (every 4 weeks vs every 5 months) and ratings volume (1.8K vs 4). Ultradian's advantage is in-app purchases (none vs 3) and review sentiment (100% vs 86%). On price and ads there is nothing between them.

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

Flow holds the better App Store score, 4.8 against 3.3. That said, the two scores are not equally well evidenced: Flow has 1.8K ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 86% of Flow's written reviews are positive against 100% of Ultradian's, so the app with the better star average is not the one people write more warmly about.

Flow ships an update every 4 weeks, Ultradian every 5 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Flow | Ultradian |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.8K ratings)](https://appshunter.io/ios/app/flow-focus-and-pomodoro-timer/id1423210932/reviews)** | [3.3 (4 ratings)](https://appshunter.io/ios/app/ultradian/id1482130799/reviews) |
| Number of ratings | **1.8K** | 4 |
| Positive reviews | 86.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 5 months |
| Monetization | Freemium | **Free** |
| Size | 86 MB | 7 MB |
| Requires iOS | 26.0 | **17.5** |
| Devices | **iPhone, iPad, Mac, Apple Watch, Vision Pro** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yugen GmbH](https://appshunter.io/developer/1362171211) | [Katherine Gratale](https://appshunter.io/developer/1482130798) |

## What reviewers say

### Flow

[App page](https://appshunter.io/ios/app/flow-focus-and-pomodoro-timer/id1423210932)

Enhance concentration and productivity with a scientifically proven method that divides work into timed intervals with breaks. Block distractions, track progress, and sync with calendars for a more focused workflow.

**Highlights:** Pomodoro timer with work/break intervals, App and web blocking, Statistics tracking, Calendar and Health sync, Customizable durations, Inspirational quotes, Metronome

**Features:** Family Sharing, Apple Watch app, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $2.99 | per month |
| Yearly Plan | $17.99 | per year |
| Lifetime Pro Access | $39.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Minimalist and uncluttered design
- 💡 Customizable work and break durations
- 🔒 No ads or unnecessary features
- 🤖 Responsive and helpful developers

**What reviewers complain about**

- 🐛 Occasional bugs and glitches
- 🔇 Notification sound could be louder
- 📊 Lack of detailed statistics and analytics
- 🔀 Inability to pause or resume a flow session
- 🖥️ Inability to minimize the timer window

**Reported bugs**

- Live activity feature not working consistently
- Timer not recording sessions accurately
- App blocking functionality not working as expected
- Crashes and freezes on certain macOS versions

**Requested features**

- Allow custom work and break durations
- Add option to pause and resume flow sessions
- Implement real-time sync across devices
- Provide more detailed productivity tracking and reporting
- Include an Apple Watch app with complication support


### Ultradian

[App page](https://appshunter.io/ios/app/ultradian/id1482130799)

Leverage your natural energy cycles for optimal task management and rest. This app analyzes biometric data to predict your ultradian rhythms, helping you schedule demanding activities during peak energy and breaks when needed.

**Highlights:** Analyze biometric data, Predict ultradian rhythms, Schedule peak task times, Schedule rest breaks, Connects to Apple Health

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flow free?

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

### Is Ultradian free?

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

### Which has better reviews, Flow or Ultradian?

Flow is rated higher. Flow averages 4.8 out of 5 from 1.8K ratings, while Ultradian averages 3.3 from 4 ratings.

### Do Flow or Ultradian have ads?

Neither Flow nor Ultradian shows ads.

### Which is updated more often, Flow or Ultradian?

Flow ships an update every 4 weeks, and Ultradian every 5 months. Most recently, Flow was updated on November 6, 2026 and Ultradian on November 3, 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.*