Abacus Lesson vs AR Volt Meter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Abacus Lesson
Learn the simple and fast method of division using an abacus. This app focuses on developing mental calculation skills by leveraging the abacus technique. It's recommended to master addition, subtraction, and multiplication with an abacus first.
- Learn abacus division techniques
- Develop mental calculation skills
- Focus on Soroban method
- Step-by-step division instruction
- Builds on addition, subtraction, multiplication
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An abacus is named "Soroban" in Japan. Do you know what an abacus is? The abacus is very simple calculator used in China, Japan, Korea and so on. Some people may say "Isn't it an unnecessary tool if you have a calculator such as a smartphone?". Answer would be "No". The biggest difference between electric calculators and the abacus is whether you need to hold it in your hand when calculating. Because of its simplicity, you will be able to easily use the abacus in your mind. In the app, we will explain simple and fast method of the division using the abacus. To learn division, it is essential to be able to add, sub, and multiplication with an abacus. If you are new to them, we recommend that you learn addition subtraction multiplication with the app in my app list first. This app will give you the skill of calculation of division.
AR Volt Meter
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１．測定したい面にカメラを向けてください ２．平面を自動で検出するので，タップします ３．原点が追加されます ４．電圧計とBluetoothで接続します ５．電圧のデータが受信できていることを確認してください ６．電極の先をトラッキングするために色をスポイトで抽出してください ７．RECボタンを押すとARで電圧の値がその場に現れます 対応している電圧計 M5StickC Plus（M5STACK-K016-P）と M5Stack用電圧計ユニット（M5STACK-U087）の組み合わせ M5StickC（M5STACK-K016-C）と M5Stack用電圧計ユニット（M5STACK-U087）の組み合わせ
Screenshots
Verdict
The clearest difference is in-app purchases: AR Volt Meter at none against Abacus Lesson's 3. AR Volt Meter also leads on ads (none vs shown). On price, device support 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. Abacus Lesson sells 3 one-off in-app purchases. AR Volt Meter asks for nothing beyond the download.
| Parameter | Abacus Lesson | AR Volt Meter |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (8 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 8 — better | — |
| Update frequency | Monthly | — |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 132 MB | 77 MB |
| Age rating | 4+ | 4+ |
| Developer | Hirokazu Komatsu | ATSUSHI INAGAKI |
In-app purchases
Abacus Lesson
- Donation Lv1 for hiding Ad$1.99
- Donation Lv2 for hiding Ad$3.99
- Donation Lv3 for hiding Ad$8.99
AR Volt Meter
No in-app purchases
Questions
Is Abacus Lesson free?
Is AR Volt Meter free?
Do Abacus Lesson or AR Volt Meter have ads?
Other comparisons
