# Sleep IGO vs FB Calendar

The clearest difference is update cadence: FB Calendar at weekly against Sleep IGO's every 4 months. FB Calendar also leads on device support (3 vs 1) and iOS requirement (14.0 vs 16). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Sleep IGO sells 1 one-off in-app purchase and FB Calendar sells 1 in-app purchase, starting at $1.49 per month. Whichever you choose, the download price is not the number that matters.

Sleep IGO ships an update every 4 months, FB Calendar weekly. The most recent releases landed on September 13, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | Sleep IGO | FB Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fb-calendar/id1464439397/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 7 MB | 54 MB |
| Requires iOS | 16 | **14.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yuji Fujishiro](https://appshunter.io/developer/408783464) | [yasuhiro kojima](https://appshunter.io/developer/1244729145) |

## What reviewers say

### Sleep IGO

[App page](https://appshunter.io/ios/app/sleep-igo/id451384740)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| play point 50 | $0.99 | one-time |


### FB Calendar

[App page](https://appshunter.io/ios/app/fb-calendar/id1464439397)

Easily share your free days without revealing your full schedule. Select your availability and send a calendar image via SNS. Ideal for those who want to share schedules privately and quickly.

**Highlights:** Share free days only, Send calendar image via SNS, Select day's state, Privacy-focused schedule sharing, Icon customization (Premium), Passcode protection (Premium)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium plan | $1.49 | per month |


## Frequently asked questions

### Is Sleep IGO free?

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

### Is FB Calendar free?

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

### Do Sleep IGO or FB Calendar have ads?

Both Sleep IGO and FB Calendar show ads.

### Which is updated more often, Sleep IGO or FB Calendar?

Sleep IGO ships an update every 4 months, and FB Calendar weekly. Most recently, Sleep IGO was updated on September 13, 2026 and FB Calendar on September 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.*