Sleep IGO vs FB Calendar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sleep IGO
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Sleep IGO – Fall Asleep with Go Sleep IGO is an app that automatically replays classic Go game records. The gentle, steady rhythm of each move helps calm your mind and guides you into restful sleep. A perfect companion at the end of your day. Key Features - Automatic replay of Go game records - Around 50 classic games, mainly featuring Honinbo Shusaku from the Edo period - Includes AlphaGo game records - Visual evaluation graph showing the flow of the game - Simple and calming user interface
FB Calendar
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.
- Share free days only
- Send calendar image via SNS
- Select day's state
- Privacy-focused schedule sharing
- Icon customization (Premium)
- Passcode protection (Premium)
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When is free? This app is for answering such questions. Have you ever wondered, "Ah, I don’t want others to see this schedule ..." when trying to send a screenshot of schedule? In Free/Busy Calendar, in order to solve such trouble, we implemented only the function to share the free/busy day simply! If you tap the day, you can choose the day's state. You can also send a calendar image with SNS! It is recommended for such a person! ・ I want to share my schedule, but I don’t want others to see my schedule ・ It is difficult to write out free days ・ I want to share my schedule easily and quickly ■■■ About Premium Plan ■■■ The standard plan has the following restrictions. Number of icons that can be used Advertisement Passcode ■ About automatic renewal billing You can stop the automatic renewal at least 24 hours before the end of the registration period. The automatic renewal procedure will be carried out from 24 hours before the registration period to the end of the period. ■ Confirmation and cancellation App Store App-> User Icon at the top right of the ToDay tab-> Subscription Here you can check the cancellation of automatic renewal, settings, and renewal date. ■ Caution ・ You cannot cancel the automatic renewal of the premium plan from within the app. ・ Your iTunes account will be charged. ・ We do not accept cancellations for the current month. ■ Terms of Use / Privacy Policy We do not provide any personally identifiable information to third parties. We pay close attention to the management of personal information and handle it as follows. ・ When supporting Support emails do not send any personally identifiable information. ・ Detailed link https://note.com/kojiro79/n/n7c8899db1c9b ■ Disclaimer We provide as much support as possible for problems and inconveniences in use, but the developer is not responsible for any damage caused by the user through this application.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Sleep IGO | FB Calendar |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 months | Weekly — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16 | 14.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuji Fujishiro | yasuhiro kojima |
In-app purchases
Sleep IGO
- play point 50$0.99
FB Calendar
- Premium plan1 Month trial$1.491 Month









