圖標

Rechenzwerge

Counting and math practice for preschool and elementary school
新版本 0.1.66
The parent area is now always reachable from the menu at the top right: tap the three dots, then "For parents". The app name on the start screen is gone, which gives the icons more room. The coin badge only appears when the games corner is switched on.
Rechenzwerge is a practice app for preschool and elementary school kids. Older kids practice the times tables and the four basic operations, the youngest count quantities without any reading. Kids who do math collect math coins and can spend them in the games corner once parents enable it.

Practice math
- Times tables (2 to 10), addition, subtraction, multiplication and division, freely combinable
- Number range up to 10, 20, 100 or 1000
- Practice rounds with 10, 50 or 100 tasks, each task appears only once
- Mistakes are fine: try again or show the solution, nothing is given away on the first try
- Results with accuracy, total time, time per task and 1 to 3 stars
- "Practice again" repeats exactly the tasks that were answered wrong
- Best scores with a progress chart per level: shows whether tasks are being solved faster over time

Practice counting (for the youngest)
- Count quantities up to 5, 10 or 20, clearly laid out in rows of five
- Two modes: pick the dice pips or place objects on the counting board
- All choices are picture tiles, no reading needed
- After counting correctly, the matching number appears and is read aloud (can be turned off)
- Calm design: one motif per round, confetti only at the end

Mascot
- Build your own mascot: color, head shape, hairstyle and accessories, or randomly with "Surprise me"
- The mascot accompanies practice with a speech bubble and cheers for correct answers

Math coins and games corner
- Tasks solved correctly on the first try earn math coins: 10 tasks make 1 coin
- After every round, the results show how many coins were added and how many tasks are left until the next coin
- The games corner is off by default and is enabled by parents
- Three mini games: Egg catch, Space and Blocks
- 5 math coins buy 3 minutes of guaranteed play time
- After that the game continues as free bonus time until all lives are used up
- A running game is never interrupted
- The level goes up every 30 seconds, also during bonus time

Parent area
- Opened with a 3-second press and hold, optionally also protected by a PIN
- Daily limit for the games corner: 15 minutes
- Enabling the games corner
- Test credit for math coins (+1, +5, +25)
- Progress per game

And also
- No real money, no in-app purchases, no ads, no tracking, no permissions
- All sounds can be turned off
- All practice data stays on the device

版本

雖然在下方可選擇下載 APK 檔案,但要留意這樣的安裝方式將不會收到更新通知,是一種較不安全的下載方法。建議您先安裝 F-Droid 用戶端使用。

下載 F-Droid
  • 版本 0.1.66 (2066) 建議 於 2026 年 10 月 29 日新增

    arm64-v8a

    此版本需要 Android 7.0 或更高的版本。

    此套件包由原開發者建置和簽署,並保證與此原始碼 Tarball 保持一致。

    權限
    • de.happybuers.rechenzettel.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    下載 APK 9 MiB PGP 簽章 | 建置紀錄

  • 新版本 0.1.61
    Games: rounds continue past ticket time as free bonus time until the lives run out - difficulty keeps rising. Blocks now shows a next-piece preview, Space has a black starfield and lane steps, Egg Catch adds a basket figure.
  • 版本 0.1.61 (2061) - 於 2026 年 10 月 27 日新增

    arm64-v8a

    此版本需要 Android 7.0 或更高的版本。

    此套件包由原開發者建置和簽署,並保證與此原始碼 Tarball 保持一致。

    權限
    • de.happybuers.rechenzettel.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    下載 APK 9 MiB PGP 簽章 | 建置紀錄

  • 新版本 0.1.60
    System bars stay visible (edge-to-edge) - fixes the Play review finding. Back gesture asks before leaving.
  • 版本 0.1.60 (2060) - 於 2026 年 10 月 25 日新增

    arm64-v8a

    此版本需要 Android 7.0 或更高的版本。

    此套件包由原開發者建置和簽署,並保證與此原始碼 Tarball 保持一致。

    權限
    • de.happybuers.rechenzettel.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    下載 APK 9 MiB PGP 簽章 | 建置紀錄