# Focus Battery vs Calm Rhythm

The clearest difference is in-app purchases: Calm Rhythm at none against Focus Battery's 2. Focus Battery's advantage is update cadence (every 4 days vs every 3 weeks) and iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Focus Battery sells 2 in-app purchases, starting at $9.99 per month. Calm Rhythm asks for nothing beyond the download.

Focus Battery ships an update every 4 days, Calm Rhythm every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Focus Battery | Calm Rhythm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/focus-battery/id6755793734/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Monetization | Subscription | — |
| Size | 96 MB | 5 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Oleksandr Demchenko](https://appshunter.io/developer/1856395168) | [剑炜 陈](https://appshunter.io/developer/1868267178) |

## What reviewers say

### Focus Battery

[App page](https://appshunter.io/ios/app/focus-battery/id6755793734)

Understand your daily focus, mental energy, and peak productivity times. Track how ADHD medications may impact your day and plan your work and breaks around your mind's natural rhythms. Ideal for those with ADHD or seeking to optimize productivity.

**Highlights:** Daily focus forecast, ADHD medication tracking, Mental energy monitoring, Focus metrics and insights, Deep work session planner, Journaling and trend analysis, Focus tests and music

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Focus Battery Pro — Monthly | $9.99 | per month |
| Focus Battery Pro – Annual | $49.99 | per year |


### Calm Rhythm

[App page](https://appshunter.io/ios/app/calm-rhythm/id6760476752)

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

**In-app purchases:** none


## Frequently asked questions

### Is Focus Battery free?

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

### Is Calm Rhythm free?

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

### Do Focus Battery or Calm Rhythm have ads?

Neither Focus Battery nor Calm Rhythm shows ads.

### Which is updated more often, Focus Battery or Calm Rhythm?

Focus Battery ships an update every 4 days, and Calm Rhythm every 3 weeks. Most recently, Focus Battery was updated on October 24, 2026 and Calm Rhythm on October 25, 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.*