Uchinoko Diary vs Koura Diary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Uchinoko Diary
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Little moments with your pet deserve to be remembered. Uchinoko Diary helps you capture everyday life with a photo and a note of up to 60 characters. From sleepy afternoons to a favorite toy, keep the moments you’ll want to revisit. • A simple daily diary Save a photo, add a short note, and use stamps to capture moods and highlights. You can edit saved entries later. • Your days at a glance Browse photos and stamps in the monthly calendar, or find past memories in the diary list. • A month of memories on one album page Choose a favorite photo entry from each week to create a monthly album. Personalize it with backgrounds, frames, and title decorations you’ve unlocked. • Sit back and revisit photo memories Replay photo entries from a selected month in random order. Pause whenever you like or move between entries. • A profile full of personality Keep your pet’s photo, name, birthday, age, personality, and special talent together. Adjust the position and zoom of the profile photo. • More to collect as you keep writing Unlock rewards through diary milestones, seasons, and your pet’s birthday. Watch an egg crack open to reveal album decorations, app icons, and diary backgrounds. • Your pet on your Home Screen An iPhone widget shows the profile photo, today’s diary status, and your writing streak. Tap it to open today’s entry. For dogs, cats, rabbits, hamsters, guinea pigs, parakeets, finches, goldfish, rice fish, turtles, and other beloved pets. Make room for their everyday moments, at your own pace. The app displays ads. An in-app purchase is available to remove them.
Koura Diary
Log your turtle's daily care, including weight, temperature, and meals. Track growth with charts and a calendar, and store shell photos. Get care reminders and manage multiple pets.
- Daily care logging
- Growth charts and calendar
- Shell photo timeline
- Care reminders
- Multiple turtle management
- Offline viewing
- Data export
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Koura Diary — gently record your turtle's every day, whether tortoise or aquatic. Easily enter weight, shell length, temperature, humidity, meals, and droppings by date. Entries flow automatically into charts and a calendar, so you can review growth and changes in condition at a glance. No ads. You can also log several turtles together. ▼ What you can do with Koura Diary • Easy entry — jot down each day's care on a single daily card • See growth — cute charts of weight & shell-length trends and meal distribution • Look back by calendar — check bowel-movement status at a glance • Shell photo timeline — collect shell photos and compare changes over the years • Share memories — turn photos into Polaroid-style cards for social media • Everyone's Turtles — share one photo a day on Today's Turtle and see other owners' turtles; picked photos stay on the Turtle Board • Condition guidance — hints on body build and dietary balance • Care reminders — notifications so you never forget • Multiple turtles — manage logs, photos, and favorite foods per individual • Backup — export your records and keep them on hand • Viewable offline • Japanese / English / Chinese (Simplified & Traditional) / Korean Keep your turtle's little daily changes, together with its lovely shell. Note: This app is a care-logging aid. Nutrition and health indicators are general guidance only and are not a substitute for diagnosis or advice from a veterinarian. If you notice any concerning symptoms, please consult an animal hospital.
Screenshots
Verdict
The clearest difference is ads: Koura Diary at none against Uchinoko Diary's shown. On price, update cadence, in-app purchases 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. Uchinoko Diary sells 1 one-off in-app purchase and Koura Diary sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.
| Parameter | Uchinoko Diary | Koura Diary |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 days | Every 4 days |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 229 MB | 104 MB |
| Age rating | 4+ | 4+ |
| Developer | Ota Sato | Futo Togawa |
In-app purchases
Uchinoko Diary
- 広告を非表示にする$2.99
Koura Diary
- Support Coffee (Small)$0.99
- Support Coffee (Medium)$1.99
- Support Coffee (Large)$3.99









