# SOLOPRA

> Abacus and mental arithmetic problem generator for various math operations. (iPhone/iPad app by Naoki Fujimura.)

- Source: https://appshunter.io/ios/app/solopra/id6449710640 (this page in markdown: same URL + `.md`)
- Developer: [Naoki Fujimura](https://appshunter.io/developer/1690172052)
- Category: Education, Entertainment
- Price: $4.99
- Rating: 5.00/5 from 10 App Store ratings
- Age rating: 4+
- Requires: iOS 16.2 · 1 MB
- Languages: American English
- Released: 2023-06-04
- Data updated: 2026-07-28
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/solopra/id6449710640/reviews.md

## What is SOLOPRA?

そろばんや暗算の問題作成アプリです。
たし算、ひき算、みとり算、かけ算、わり算、フラッシュ暗算の問題が利用できます。


■たし算、ひき算
繰り上がり（繰り下がり）の設定を行うことができます。五玉の合成・分解、繰り上がり、その両方の細かな設定を行うことができ、そろばん始めたての子供に優しい問題作成ツールとなっています。

■見取り算
たし算、ひき算と同様、細かなレベル設定に加え、桁数の範囲を設定でき口数、問題数も自在に変更できます。
答えの欄をタップしてすぐに答えの確認もすることができます。

■かけ算、割り算
小数点の有無に加え、わり算はわる数と答えの桁数を設定するモードとわられる数とわる数の桁数を設定するモードを使用できます。検定用に自在に問題を変えることが可能です。

■フラッシュ暗算
独自のアルゴリズムを用いて、最速0.02秒の間隔で問題を表示させることが可能です。ギネス記録の速さを遥かに超えるスピードで問題の提供が可能になりました。また、プレビュー画面で文字サイズ、文字の色、背景の色を設定でき自分にあうモードを選べます。

## Key features

- Customizable addition and subtraction problems
- Adjustable difficulty for mixed addition/subtraction
- Flexible multiplication and division settings
- High-speed flash mental arithmetic mode
- Personalizable display options for flash mode


## Frequently asked questions about SOLOPRA

### What math operations does SOLOPRA support?

SOLOPRA supports addition, subtraction, mixed addition/subtraction, multiplication, division, and flash mental arithmetic. Users can customize settings like decimal points and digit counts for these operations.

### Can I adjust the difficulty of the problems in SOLOPRA?

Yes, SOLOPRA allows for detailed difficulty adjustments. For addition and subtraction, you can configure carry-overs and the use of five-bead counters. For division, you can set the number of digits for the divisor and quotient, or the dividend and divisor.

### How fast is the flash mental arithmetic mode in SOLOPRA?

SOLOPRA's flash mental arithmetic mode uses a unique algorithm to display problems at intervals as fast as 0.02 seconds. This speed significantly exceeds typical human capabilities and allows for rapid practice.

### Can I personalize the appearance of the flash mental arithmetic mode?

Yes, SOLOPRA offers personalization options for the flash mental arithmetic mode. You can adjust the text size, text color, and background color in the preview screen to suit your preferences.

### What devices is SOLOPRA available on?

SOLOPRA is available for iPhone and iPad devices. It is designed to run on Apple's mobile operating systems.

### What is the age rating for SOLOPRA?

SOLOPRA has an age rating of 4+. This indicates it is suitable for children aged 4 and above, making it accessible for early learners.

### How often is SOLOPRA updated?

SOLOPRA was last updated on June 4, 2023, with version 1.0. As of the latest information, there have been no subsequent updates, suggesting it may have a less frequent update schedule.

### What do users like about SOLOPRA?

Based on its 5.0-star rating from 10 reviews, users likely appreciate SOLOPRA's comprehensive customization options for creating tailored math problems. The high-speed flash mental arithmetic and detailed control over problem parameters are also probable highlights.

## Version history (last 1 release)

### 1.0 — 2023-06-04

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-28.*