Comparison

ReBrain vs Onske

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ReBrain

Features
Read full description

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

About

Onske

Features
Read full description

・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

ReBrain4 screens
Onske4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 3 level
ReBrain versus Onske: the parameters behind the verdict, then further details
ParameterReBrainOnske
PriceFreeFree
Update frequencyEvery 10 daysEvery 4 days — better
AdsNo — betterYes
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.2 — better26.0
Further details — not scored
Size64 MB35 MB
Age rating4+4+
Developerryota hatazawaTOMOKO IGIMI

In-app purchases

3 purchases

ReBrain

Subscriptions2
  • ReBrain Pro 月額$1.991 Month
  • ReBrain Pro 年額$5.991 Year
One-time1
  • ReBrain Pro 買い切り$9.99
1 purchases

Onske

One-time1
  • Onske Premium$2.99

Questions

Is ReBrain free?
ReBrain is free to download, with in-app purchases available.
Is Onske free?
Onske is free to download, with in-app purchases available.
Do ReBrain or Onske have ads?
Onske shows ads; ReBrain does not.
Which is updated more often, ReBrain or Onske?
ReBrain ships an update every 10 days, and Onske every 4 days. Most recently, ReBrain was updated on October 30, 2026 and Onske on November 5, 2026.

Other comparisons