# Focus Timer vs Calendar Busy Sync

The clearest difference is in-app purchases: Calendar Busy Sync at none against Focus Timer's 4. Calendar Busy Sync also leads on iOS requirement (16.0 vs 26.0). Focus Timer's advantage is update cadence (every 5 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Focus Timer sells 4 in-app purchases, starting at $2.99 per 7 days. Calendar Busy Sync asks for nothing beyond the download.

Focus Timer ships an update every 5 days, Calendar Busy Sync every 2 months. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Focus Timer | Calendar Busy Sync |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 2 months |
| Size | 10 MB | 10 MB |
| Requires iOS | 26.0 | **16.0** |
| Devices | iPhone, Mac | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pentarab](https://appshunter.io/developer/1453947051) | [Sous Chef Studio, Inc.](https://appshunter.io/developer/1768173412) |

## What reviewers say

### Focus Timer

[App page](https://appshunter.io/ios/app/focus-timer-focusmind/id6754965226)

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $2.99 | per 7 days |
| FocusMind Monthly | $4.99 | per month |
| FocusMind Yearly | $39.99 | per year |
| FocusMind Pro | $49.99 | one-time |


### Calendar Busy Sync

[App page](https://appshunter.io/ios/app/calendar-busy-sync/id6762634278)

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

**In-app purchases:** none


## Frequently asked questions

### Is Focus Timer free?

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

### Is Calendar Busy Sync free?

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

### Do Focus Timer or Calendar Busy Sync have ads?

Neither Focus Timer nor Calendar Busy Sync shows ads.

### Which is updated more often, Focus Timer or Calendar Busy Sync?

Focus Timer ships an update every 5 days, and Calendar Busy Sync every 2 months. Most recently, Focus Timer was updated on October 25, 2026 and Calendar Busy Sync on October 28, 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.*