Oto Diary vs Ichigyo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Oto Diary
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Some moments can't be captured in a photo or a sentence. Oto Diary is an audio journal that keeps the sound of your day in as little as 10 seconds. Just press and hold the cassette reel. One year later, on the same day, that sound comes back to you as a Time Capsule. The more days you record, the more your calendar and Year view fill up with a year that's uniquely yours. ■ Features · Press and hold the reel to record (choose 10, 30 or 60 seconds and more, once a day) · Label each tape with a title and one of five moods: Calm, Happy, Tired, Tender, Wonder · Calendar: every recorded day gets a waveform. Tap a day to play it back · Year view: see all twelve months of your recordings at a glance · Time Capsule: a notification brings back the sound you recorded one year ago today · Not so long ago: replay what you recorded one week and one month ago, right in the Capsule tab · Favorites: keep your most precious recordings in one album · Streaks: see how many days in a row you've kept going · Daily reminder at the time you choose ■ Perfect for · Anyone who never managed to keep a written journal · Parents saving their kids' voices, pet owners, families · Capturing your commute, your travels, and the changing seasons in sound · Building a tiny 10-second daily habit · Keeping memories in a form that photos can't ■ Privacy · Every recording is stored on this device · No account needed. Your recordings are never uploaded to a server · The mic is used only while you hold the reel, with a recording light on screen · To introduce other apps by the same developer, the app may load public App Store information. Your recordings and entries are never sent
Ichigyo
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One small entry. A day worth keeping. Ichigyo is a quiet diary for the days you want to remember, and the days when a few words are enough. Write up to 140 characters a day. A sentence, a thought, or just "Tired." Save it, and you're done. A ROOM MADE OF YOUR DAYS Your entries become monthly and weekly books in a little attic library. Read them on the bookshelf, arrange your room, and look out at a Japanese countryside view that changes from morning to night. As you record more days, furniture and animal companions become available. Past entries count, and you don't need a streak. Gifts you've earned stay available even if you delete an entry. WORDS THAT FIND YOU AGAIN Rediscover an entry from the same day a year ago. When you're just starting, entries from a week or a month ago can return first. Choose your notification time and whether the entry itself appears on your lock screen. NO STREAK TO PROTECT Missed days are simply blank. No red crosses, no broken-streak alerts. Keep the days you write, and come back whenever you like. YOUR DIARY STAYS WITH YOU Diary entries are stored on your device, without an account or automatic cloud sync. Ichigyo does not send your entries to a diary server. Export them as TXT or CSV for free. An optional paid unlock adds password-protected backup export for moving your diary to another device. READ, KEEP, AND SHARE - Browse your calendar, entry list, monthly books, and weekly books. - Revisit the same date across different years. - Save a favorite entry as a poem card, with horizontal or vertical text. - Turn your room, bookshelf, scenery, or keepsake into a wallpaper image. - See a year at a glance and export an image. - Add a widget, with control over whether diary text is shown. OPTIONAL ONE-TIME PURCHASES Writing, basic reading, notifications, TXT/CSV export, and the basic room remain free. No ads or subscriptions. Unlock Journal Features adds four writing themes, app lock with Face ID or device passcode, access to all years in On This Day, A6 PDF books, encrypted backup export, and an alternate app icon. Room and scenery packs are separate purchases: - Lamplit Study: walnut furniture, warm lighting, and decor. - Seaside Window: a seaside view; furniture is not included. - Lakeside Cabin: a lake view, oak furniture, and lakeside decor. - Rainy Street Study: a rainy streetscape, furniture finishes, and decor. - Forest Greenhouse: a garden and greenhouse view, furniture finishes, and decor. - Halloween Study, Christmas Night, and New Year Room: seasonal interiors and decorations, offered during their sale periods. Purchased seasonal items remain usable year-round. Room packs do not include Unlock Journal Features, and that unlock does not include room packs. Companions and diary rewards are earned through recorded days. The scenery and sky use Japan time and a Tokyo-based sky. They do not follow your location or the actual weather. Rainy Street Study and Forest Greenhouse include seasonal scenery changes. JAPANESE AND ENGLISH Use the same app in Japanese or English. Your own entries stay exactly as you wrote them, in any language. A few words today. A little of your life to return to.
Screenshots
Verdict
Oto Diary and Ichigyo are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Oto Diary sells 1 one-off in-app purchase and Ichigyo sells 9 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Oto Diary ships an update every 6 weeks, Ichigyo every 3 weeks. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.
| Parameter | Oto Diary | Ichigyo |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 2 MB | 271 MB |
| Age rating | 4+ | 4+ |
| Developer | torankirite | Ryo Uejima |
In-app purchases
Oto Diary
- Sound Diary Premium$3.99
Ichigyo
- Lamplit Study$3.59
- Seaside Window$3.59
- Lakeside Cabin$3.59
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- New Year Room$3.59
- Forest Greenhouse$3.59
- Halloween Study$3.59
- Christmas Night$3.59
- Rainy Street Study$3.59
- Unlock Journal Features$4.99









