# one digit addition

> Single-digit addition training and speed puzzle game with multiple stages. (iPhone/iPad app by Currach Software.)

- Source: https://appshunter.io/ios/app/one-digit-addition/id424279638 (this page in markdown: same URL + `.md`)
- Developer: [Currach Software](https://appshunter.io/developer/315759561)
- Category: Games, Education, Puzzle
- Price: Free
- Rating: 3.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 8.0 · 4 MB
- Languages: American English, Japanese
- Released: 2011-03-12
- Data updated: 2026-07-06
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/one-digit-addition/id424279638/reviews.md

## What is one digit addition?

This App "one digit +" is one digit addition  training App. And this is a search game and speed puzzle game, too. There are 9 questions on nine stages, random 81 questions from "1 + 1 = 2" to "9 + 9 = 18".

This is a Lite version of "one digit +-x÷".  The paid full version has four categories.    Addition:"one digit + ", subtraction:"one digit - ", multiplication:"one digit x " and division:"one digit ÷ ".

## Key features

- Single-digit addition practice
- Speed puzzle game
- Search game mode
- Nine stages with random questions
- Lite version of a full math app


## Frequently asked questions about one digit addition

### What is one digit addition?

one digit addition is a game designed to help users practice single-digit addition. It includes a speed puzzle and search game mode across nine stages.

### How many questions are in one digit addition?

There are 9 questions on each of the nine stages, totaling 81 random questions ranging from '1 + 1 = 2' to '9 + 9 = 18'.

### Is one digit addition free to play?

Yes, one digit addition is available for free. It is a lite version of a paid application that offers more math operations.

### What devices does one digit addition support?

one digit addition is supported on iPhone and iPod devices.

### What is the age rating for one digit addition?

The app has an age rating of 4+, making it suitable for young children learning basic math.

### Does one digit addition have ads?

No, this application does not contain advertisements.

### When was one digit addition last updated?

The latest version of one digit addition was released on January 9, 2017.

### What are the other math operations available in the full version?

The paid full version, "one digit +-x÷", includes addition, subtraction, multiplication, and division operations.

## Version history (last 5 releases)

### 2.1 — 2017-01-09

This app has been updated by Apple to display the Apple Watch app icon.

bug fixed.

### 2.0 — 2016-12-08

support iOS7 and later.

### 1.1.1 — 2013-05-06

Updated to adMob SDK version6.4.1. This version of the SDK no longer uses the iOS UDID.

### 1.1 — 2013-04-18

support Retina.
update adMob SDK.

### 1.0 — 2011-03-12

No release notes.

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## More apps by Currach Software

- [one digit multiplication tADa](https://appshunter.io/ios/app/one-digit-multiplication-tada/id408379490)
- [81 numbers ascend memory](https://appshunter.io/ios/app/81-numbers-ascend-memory/id422252842)
- [Reverse one digit multiplication tADa](https://appshunter.io/ios/app/reverse-one-digit-multiplication-tada/id483001832)
- [FTPB](https://appshunter.io/ios/app/ftpb/id1209822994)

All apps by Currach Software: https://appshunter.io/developer/315759561

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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 2026-07-06.*