ReBrain vs Onske
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ReBrain
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ReBrain is a flashcard learning app powered by a spaced repetition algorithm based on the forgetting curve. Instead of simple repetition, cards are shown at the optimal timing based on how well you remember them—helping you learn efficiently and retain information long-term. Features ・Multiple study modes: Learn with flashcards, typing, multiple-choice quizzes, and red-sheet mode. ・Quick Search: Instantly look up words with a single tap. ・Smart Study: Review based on the forgetting curve. Cards you struggle with appear more frequently, while well-learned cards appear less often. ・Custom themes (Pro): Personalize the app with different colors, fonts, and icons. There are no ads in the app, and all learning-related features are completely free. Additional customization options require a purchase. For more details, please visit our website. Site: https://rebrainapp.studio.site Terms of Use: https://rebrainapp.studio.site/termsofuse Privacy Policy: https:// rebrainapp.studio.site/privacypolicy
Onske
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・Timetable Management Flexible Display: Switch between Weekly and Vertical views with a simple double-tap. Customizable: Set subjects, classrooms, and color-codes freely. Supports up to 10 periods a day, 7 days a week (including weekends). Intuitive Editing: Edit schedules effortlessly with drag-and-drop. Class durations are also fully customizable. ・Assignment Management Class-Specific Tasks: Register assignments for each class. Deadline Settings: Choose from "Until the next class" or "Specify a date." Progress Tracking: Manage your progress with completion checkboxes and prevent missed submissions with notification reminders. ・Widgets Lock Screen: Check your next schedule the moment you pick up your phone. Home Screen: View today’s schedule at a glance without even opening the app. ・Other Features Multiple Schedules: Manage and switch between different schedules easily. Premium Option: An optional subscription (Monthly/Yearly) is available to remove ads and enable Live Activities. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: ReBrain at none against Onske's shown. ReBrain also leads on iOS requirement (18.2 vs 26.0). Onske's advantage is update cadence (every 4 days vs every 10 days). On price, 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. ReBrain sells 3 in-app purchases, starting at $1.99 per month and Onske sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
ReBrain ships an update every 10 days, Onske every 4 days. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.
| Parameter | ReBrain | Onske |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 days | Every 4 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.2 — better | 26.0 |
| Further details — not scored | ||
| Size | 64 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | ryota hatazawa | TOMOKO IGIMI |
In-app purchases
ReBrain
- ReBrain Pro 月額$1.991 Month
- ReBrain Pro 年額$5.991 Year
- ReBrain Pro 買い切り$9.99
Onske
- Onske Premium$2.99









