# Flow vs SYSTEM // ZERO

The clearest difference is update cadence: SYSTEM // ZERO at every 3 days against Flow's every 4 weeks. SYSTEM // ZERO also leads on iOS requirement (15.0 vs 18.0). Flow's advantage is device support (5 vs 2). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Flow sells 3 in-app purchases, starting at $2.99 per month and SYSTEM // ZERO sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Flow ships an update every 4 weeks, SYSTEM // ZERO every 3 days. The most recent releases landed on October 16, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Flow | SYSTEM // ZERO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.8K ratings)](https://appshunter.io/ios/app/flow-focus-and-pomodoro-timer/id1423210932/reviews)** | — |
| Number of ratings | **1.8K** | — |
| Positive reviews | 86.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 80 MB | 57 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch, Vision Pro** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Yugen GmbH](https://appshunter.io/developer/1362171211) | [Raushan Nimatov](https://appshunter.io/developer/1888973196) |

## What reviewers say

### Flow

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

Enhance your concentration and productivity with a scientifically proven method. This app divides your workflow into focused work intervals and scheduled breaks, helping you reduce stress and stay motivated. Ideal for work, study, or any task requiring deep focus.

**Highlights:** Pomodoro timer with work intervals and breaks, App and web blocking, Statistics tracking, Commitment mode, Inspirational quotes, Home & Lock Screen Widgets

**Features:** Family Sharing, Apple Watch app

**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


### SYSTEM // ZERO

[App page](https://appshunter.io/ios/app/system-zero/id6801821275)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Knight Protocol System Pack | $9.99 | one-time |
| Solo Level Up System Pack | $9.99 | one-time |


## Frequently asked questions

### Is Flow free?

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

### Is SYSTEM // ZERO free?

SYSTEM // ZERO is free to download, with in-app purchases available.

### Do Flow or SYSTEM // ZERO have ads?

Neither Flow nor SYSTEM // ZERO shows ads.

### Which is updated more often, Flow or SYSTEM // ZERO?

Flow ships an update every 4 weeks, and SYSTEM // ZERO every 3 days. Most recently, Flow was updated on October 16, 2026 and SYSTEM // ZERO on October 10, 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.*