Oshi vs Solo Diary
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Oshi
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A countdown app for your oshi's special events. Features: - Countdown & count-up (track days since a memorable date) - Customize backgrounds with your favorite photos or colors - Home screen & Lock screen widgets - Live Activity (Dynamic Island / Lock screen real-time display) - Reminder notifications (on the day & days before) - Share to social media Supported Languages: Japanese, English, Korean, Chinese (Simplified/Traditional), Spanish, Portuguese, French, Thai, Indonesian Concerts, live shows, birthdays, fan meetings... every day until you see your oshi becomes more exciting.
Solo Diary
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Solo Diary replaces the habit of opening social media with a timeline that's only yours. โ No one can see it No followers, no public posts, no like counts. What you write here is yours alone. Instead of comparing yourself to others, you face only your past self. โ Instead of likes, a word from an AI When you post, an AI leaves a short comment. Choose from three personalities โ Empathetic, Witty, or Matter-of-fact. AI comments are optional; every feature still works with them off. When on, only your note's text is sent to generate a comment. Photos are never sent. โ Your past self, returning "A month ago / a year ago today" surfaces at the top of your timeline, so you can gently reread how you felt back then. โ Quiet by design A dark theme. No red notification badges, and no endless scroll โ a finite timeline you can actually finish. โ In your language Available in English, Japanese, Chinese, Korean, and Spanish. The app follows your device language, and the AI replies in your language too. No account needed. Your data stays on your device and can be deleted anytime. Free to use (ads support the AI feature). Prefer no ads? A one-time "Remove ads" purchase hides them all.
Screenshots
Verdict
The clearest difference is in-app purchases: Solo Diary at none against Oshi's 1. Solo Diary also leads on iOS requirement (15.0 vs 26.2). Oshi's advantage is update cadence (daily vs every 6 weeks). On price, ads and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Oshi sells 1 one-off in-app purchase. Solo Diary asks for nothing beyond the download.
Oshi ships an update daily, Solo Diary every 6 weeks. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.
| Parameter | Oshi | Solo Diary |
|---|---|---|
| Price | Free | Free |
| Update frequency | Daily โ better | Every 6 weeks |
| Ads | Yes | Yes |
| In-app purchases | Yes | No โ better |
| Devices | iPhone | iPhone, iPod โ better |
| Requires iOS | 26.2 | 15.0 โ better |
| Further details โ not scored | ||
| Size | 5 MB | 28 MB |
| Age rating | 4+ | 12+ |
| Developer | YOSHIKI KOAKUTSU | Sae Ueno |
In-app purchases
Oshi
- Remove Ads$0.99
Solo Diary
No in-app purchases









