Comparison

April Buff vs ROBOKAMU Premium(Bluetooth)

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

Head to head
About

April Buff

This app uses augmented reality to make learning English vocabulary fun for elementary students. It offers interactive games, quizzes, and progress tracking linked to a specific curriculum. Users can collect word cards and compete nationally.

Highlights
  • AR-based vocabulary study
  • Interactive games and quizzes
  • Collect word and chunk cards
  • National ranking system
  • Scan textbook to start games
  • Linked to Learning Portal
Features
Read full description

※ April Buff is an AR-based vocabulary study and quiz APP for elementary school students using April English curriculum. - Use augmented reality(AR) technology to study vocabulary and take quizzes through fun games - Prepare for April English weekly and monthly tests by solving questions and studying key words again - Collect words and chunks cards from playing games and study them again from the Card Box - Check your national ranking after completing each game - You must have April Gallery Book to use the April Buff app. ※ Game Variation by Level 1. Slime Time (Rookie/Seedbed/Seed) : Make your own slime by mixing the ingredients! 2. Dungeon Escape (Sprout) : Complete the mission and escape the underground dungeon! 3. Drone High (Sapling/Junior Master) : Charge the drone and fly it high up! ※ Main features of April Buff - Start the game by scanning the textbook. - Play vocab word games using the AR camera. - Collect words and chunks from playing the games. - Check your national ranking for each level - Linked to the Learning Portal - Change language setting ▶ Access Request Guide All access requests are collected for app usage. [Mandatory Access Request] -Device and App History: Access for App version check -Storage: File and media -Camera: Access for augmented reality effects

About

ROBOKAMU Premium(Bluetooth)

Features
Read full description

RoboKamu Premium Bluetooth App Connection Guide 1. Enable Bluetooth
Go to your smartphone’s Settings > Bluetooth menu and turn on Bluetooth. 2.Connect to RoboKamu ◦ Open the RoboKamu BLE app. ◦ Tap the Connect button located at the top-right corner of the app screen. ◦ From the search list, find and select the device named ‘Kamu.’ 3. Connection Complete
Once the connection is successfully established, you can check the connection status on the app screen. Note:
 If the connection fails, try removing the existing paired device from your Bluetooth settings and reconnecting.

Screenshots

April Buff4 screens
ROBOKAMU Premium(Bluetooth)3 screens

Verdict

The call

The clearest difference is update cadence: ROBOKAMU Premium(Bluetooth) at every 2 days against April Buff's every 5 weeks. April Buff's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

April Buff ships an update every 5 weeks, ROBOKAMU Premium(Bluetooth) every 2 days. The most recent releases landed on October 15, 2026 and October 5, 2026 respectively.

Scorecard3 real differences · 7 level
April Buff versus ROBOKAMU Premium(Bluetooth): the parameters behind the verdict, then further details
ParameterApril BuffROBOKAMU Premium(Bluetooth)
PriceFreeFree
Rating4.6 (7 ratings) — better—
Positive reviews72.4% of reviews—
Number of ratings7 — better—
Update frequencyEvery 5 weeksEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better17.0
Further details — not scored
Size208 MB8 MB
Age rating4+4+
DeveloperCREVERSE, Inc.에이티로봇

In-app purchases

None

April Buff

No in-app purchases

None

ROBOKAMU Premium(Bluetooth)

No in-app purchases

Questions

Is April Buff free?
April Buff is free to download, with no in-app purchases.
Is ROBOKAMU Premium(Bluetooth) free?
ROBOKAMU Premium(Bluetooth) is free to download, with no in-app purchases.
Do April Buff or ROBOKAMU Premium(Bluetooth) have ads?
Neither April Buff nor ROBOKAMU Premium(Bluetooth) shows ads.
Which is updated more often, April Buff or ROBOKAMU Premium(Bluetooth)?
April Buff ships an update every 5 weeks, and ROBOKAMU Premium(Bluetooth) every 2 days. Most recently, April Buff was updated on October 15, 2026 and ROBOKAMU Premium(Bluetooth) on October 5, 2026.

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