KUU vs Sleeps
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KUU
This app provides a voice-first method for offloading scattered thoughts, worries, and ideas. It transcribes your spoken words and categorizes them into 'Now', 'Later', 'Park', and 'Let go' sections to help clear your mind.
- Voice-to-text transcription
- Thought categorization (Now, Later, Park, Let go)
- ADHD-friendly design
- Private iCloud sync
- Menu bar integration for Mac
- No raw audio storage
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When your head is full, it can be hard to know what belongs in front of you and what can wait. KUU is a quiet voice-first app for brain dumps, overthinking, scattered ideas, and the small worries you do not want to keep carrying. You can speak what is on your mind. It does not need to be organized. KUU turns what you said into text and gently separates it four ways: Now / Later / Park / Let go. The point is not to do more. It is to make a little room in your head. ■ When to use it - Before bed, when your mind starts running. - When the same thought keeps looping. - When task managers have started to feel heavy. - When you want to be heard, but do not want to send it to anyone. - When talking out loud helps you understand what you mean. - When an idea appears before it has a shape. - When you do not want to forget something, but it is not ready to act on. - When voice feels easier than typing. - When your hands are busy: driving, cooking, getting ready, or moving through the day. ■ The 4 ways Now — Something that may feel lighter if you look at it soon. Later — Something to return to at another time. Park — An idea, feeling, or question that does not need an answer yet. Let go — A worry or thought you may not need to keep holding. These are not priorities or scores. They are quiet ways to hold what you said. ■ How KUU is different - Unlike a notes app, KUU starts with speaking, not writing. - Unlike a task manager, KUU does not turn every thought into something to do. - Unlike an AI chat, KUU does not give long advice or add more things to think about. KUU receives what you said and separates it into smaller, easier pieces. ■ What you can do - Speak naturally, even when your thoughts are all mixed up. - See your words as text. - See only what needs your attention now. - Keep later thoughts, parked ideas, and things to let go in their own places. - Revisit what you have said when you want to. ■ Voice and data - Raw audio is not kept. - What you said is saved as text so you can look back later. - Sorting uses AI. Only your words as text are sent, and nothing is kept. - Your saved text syncs only to your private iCloud. - Other people, and the app developer, cannot read it. ■ On your Mac KUU waits quietly in the menu bar. You can speak without opening a window, and it carries all the way through to Now / Later / Park / Let go. What you said before is always a glance away. KUU is not here to add more thoughts. It is here for the space between: “I do not need to solve this right away” and “I do not want to keep holding it in my head.” — Speaking makes room in your mind. Terms of Use: https://kuu-zen.com/en/terms/ Privacy Policy: https://kuu-zen.com/en/privacy/
Sleeps
This app helps children visualize the time until special events by counting down the number of sleeps remaining. Users can create personalized countdowns with titles, dates, pictures, and colors, and view the remaining sleeps on their home screen via widgets. It also offers optional reminders and syncs across devices.
- Sleeps countdowns
- Customizable events
- Home screen widgets
- Siri integration
- Optional reminders
- iCloud sync
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Sleeps is a countdown app for kids. It answers “how long until…?” in sleeps — the nights left until a birthday, trip, holiday, or other day they’re waiting for. Add a countdown with a title, a date, a picture, and a color. The app shows how many sleeps remain as a large number. Optional home screen widgets keep that number visible without opening the app. You can also ask Siri how many sleeps are left until a countdown you’ve saved. Optional reminders can notify you a week before, three days before, the day before, and on the morning of the event. Countdowns sync through your iCloud account across your own devices. Sleeps has no ads, no in-app purchases, no accounts, and no tracking. It does not collect data. Support and privacy information: https://iliarafa.github.io/sleeps/
Screenshots
Verdict
KUU and Sleeps both sit at 4.9 stars, but that hides the real split: 100% of Sleeps's written reviews are positive against 52% of KUU's. Sleeps also leads on in-app purchases (none vs 3) and ads (none vs shown). KUU's advantage is update cadence (every 3 days vs monthly) and ratings volume (9 vs 1). On price, rating and device support 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. KUU sells 3 in-app purchases, starting at $5.99 per month. Sleeps asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.9 for KUU against 5.0 for Sleeps. That said, the two scores are not equally well evidenced: KUU has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 52% of KUU's written reviews are positive against 100% of Sleeps's.
KUU ships an update every 3 days, Sleeps monthly. The most recent releases landed on November 13, 2026 and October 31, 2026 respectively.
| Parameter | KUU | Sleeps |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (9 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 51.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 9 — better | 1 |
| Update frequency | Every 3 days — better | Monthly |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, Mac, Apple Watch — better | iPhone, iPad, Apple Watch |
| Requires iOS | 26.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 36 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Shunya Yamashita | Ilias Rafailidis |
Customer experience
KUU
Sleeps
In-app purchases
KUU
- KUU+ Monthly$5.991 Month
- KUU+ Yearly3 Days trial$39.991 Year
- KUU+ Lifetime$89.99
Sleeps
No in-app purchases









