Sleep IGO vs AtoDays
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
AtoDays
Track upcoming events and anniversaries with a simple countdown. Get instant updates with home and lock screen widgets, and receive timely notifications. Seamlessly import events from your calendar for automatic tracking.
- Automatic countdown to any date
- Customizable notifications
- Repeat event settings
- Calendar event import
- Home & Lock Screen widgets
- iCloud data backup
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How many days left until your big day? AtoDays counts down to your events and anniversaries. AtoDays is a simple and intuitive app that tracks the remaining days until your birthdays, exams, and special events. With seamless calendar integration, you can start counting down without any manual entry. Check your important dates anytime with Home & Lock Screen widgets and timely notifications. Key Features - Automatic countdown to any date - Stay informed with custom notifications - One-tap update to the next date with repeat settings - One-tap event import from your Calendar - Display Calendar events as countdowns automatically - Home & Lock Screen widgets for instant tracking - Secure data backup via iCloud Perfect For - Counting down to birthdays and anniversaries - Tracking vacations, concerts, or game releases - Managing deadlines for exams, certifications, and work projects Pro Version Features - Ad-free experience - Unlimited event tracking - Pro Widgets (always show selected events) - Direct Calendar sync for real-time countdowns
Screenshots
Verdict
The clearest difference is update cadence: AtoDays at every 6 weeks against Sleep IGO's every 4 months. AtoDays also leads on device support (3 vs 1). Sleep IGO's advantage is iOS requirement (16 vs 26.0). 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 AtoDays sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Sleep IGO ships an update every 4 months, AtoDays every 6 weeks. The most recent releases landed on September 13, 2026 and September 24, 2026 respectively.
| Parameter | Sleep IGO | AtoDays |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.3 (4 ratings) — better |
| Positive reviews | — | 71.4% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 4 months | Every 6 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPad | iPhone, iPad, Apple Watch — better |
| Requires iOS | 16 — better | 26.0 |
| Further details — not scored | ||
| Size | 7 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuji Fujishiro | Shota Yamashita |
In-app purchases
Sleep IGO
- play point 50$0.99
AtoDays
- Lifetime Plan$14.99
