ReadMemory vs Ninkki
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ReadMemory
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ReadMemory is a simple reading log app designed to preserve the books you’ve read and the thoughts you had at the time. It’s not built for managing or competing, but for quietly looking back later. ■ Add books Quickly register books by scanning their ISBN barcode Manual input is kept to a minimum ■ Save your thoughts Leave short notes for each book Impressions, personal memos, or a single memorable line — freely ■ Look back Books are displayed as cards in a clean list You can visually reflect on your reading journey over time ■ Minimal design No ads No social features Just you and your reading Reading memories slowly fade the moment a book is finished. ReadMemory is a place to keep that lingering aftertaste.
Ninkki
This private AI diary app offers supportive AI characters that react to your journal entries. Analyze your writing style, collect badges, and optionally share with close friends in a private group. It's designed for personal reflection in a distraction-free space.
- AI-generated reactions and comments
- Personal writing style analysis
- Badge collection system
- Optional private sharing with friends
- Calendar view for past entries
- Distraction-free journaling environment
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"What if thoughtful AI readers responded to your private journal?" Ninkki is a private AI diary app. AI characters (clearly labeled as AI) leave supportive reactions, comments, and reflections on your personal entries — like a warm circle of readers who exist only for you. This is NOT a social network. Your diary entries are private. AI reactions are fictional and generated in real time by the app. --- What You Can Do with Ninkki --- ■ AI Readers Respond to Your Diary Write about your day in text or images. AI characters leave reactions that are always clearly labeled as AI-generated. Your entries are private to you. ■ Personal Writing Analytics AI analyzes your writing style — patterns, word choice, emotional tone. Discover your unique "writing personality." ■ Collect Badges Earn over 30 badges tied to your journaling habits. ■ Optional Private Sharing with Close Friends You may invite real close friends via QR code or link to read each other's entries in a closed, opt-in, private group. There is no public sharing feature. ■ Calendar Journal View Look back on past entries in a familiar calendar layout. --- Three Plans (AI Reader Capacity) --- Free Plan A small circle of AI readers. 3 entries/day, 1 image/day. Celebrity Plan (¥480/month) A wider circle of AI readers. 10 entries/day, 3 images/day, theme color customization. Annual plan ¥4,800 (save 4 months). Top Star Plan (¥1,480/month) The widest AI reader circle. 20 entries/day, 5 images/day, all themes and fonts, poll feature, profile background gradient. Annual plan ¥12,800 (save 4 months). --- Oshi Mode --- Free plans can register 1 fave and chat about that fave without looking up live web information. Registrations or changes are limited to 3 per month. Celebrity plans support 3 faves with weekly automatic updates. Top Star plans support 5 faves with automatic updates every 3 days. Paid plans only use web information published within the last 14 days. --- Important Disclosure --- ・All AI characters, reactions, and comments are AI-generated. ・Diary entries are private and cannot be published to any external service. ・This app is a personal journaling tool, not a social media service. --- Perfect for --- ・People who want a supportive AI companion while journaling ・People who could never keep up with a traditional diary ・People who want gentle encouragement to reflect daily ・People who want to journal in a private, distraction-free space --- About Subscriptions --- ・Payment will be charged to your Apple ID account ・Subscriptions automatically renew. If you do not cancel at least 24 hours before the end of the current period, the next period will be automatically charged ・Manage or cancel subscriptions via iOS Settings > Apple ID > Subscriptions Privacy Policy: https://ym0320.github.io/ninkki-legal/privacy-en.html Terms of Service: https://ym0320.github.io/ninkki-legal/terms-en.html
Screenshots
Verdict
The clearest difference is in-app purchases: ReadMemory at none against Ninkki's 4. ReadMemory also leads on ads (none vs shown) and device support (3 vs 1). On price and iOS requirement 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. Ninkki sells 4 in-app purchases, starting at $2.99 per month. ReadMemory asks for nothing beyond the download.
| Parameter | ReadMemory | Ninkki |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 75.0% of reviews |
| Update frequency | — | Every 6 days |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 16.4 |
| Further details — not scored | ||
| Size | 40 MB | 313 MB |
| Age rating | 4+ | 4+ |
| Developer | Ryoya Anno | YUTA NAKAYAMA |
In-app purchases
ReadMemory
No in-app purchases
Ninkki
- Celebrity Plan (Monthly)$2.991 Month
- Top Star Plan (Monthly)1 Month trial$9.991 Month
- Celebrity Plan (Yearly)$29.991 Year
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- Top Star Plan (Yearly)$79.991 Year









