# DozAddingUp

> DozAddingUp (iPhone/iPad app by Paul Rapoport.)

- Source: https://appshunter.io/ios/app/dozaddingup/id6807599106 (this page in markdown: same URL + `.md`)
- Developer: [Paul Rapoport](https://appshunter.io/developer/1892500767)
- Category: Games, Education, Board, Puzzle
- Price: Free
- Age rating: 4+
- Requires: iOS 26.0 · 1 MB
- Languages: American English
- Released: 2026-09-04
- Data updated: 2026-09-09
- User reviews in markdown: https://appshunter.io/ios/app/dozaddingup/id6807599106/reviews.md

## What is DozAddingUp?

In the dozenal number base, because the number 10 is one dozen, numerals ten and eleven must be single digits. They are represented by the symbols invented long ago by Isaac Pitman: rotated 2 for ten, and rotated 3 for eleven. Those are used by the two major dozenal societies, the Dozenal Society of America and the Dozenal Society of Great Britain. In plain text with dozenal numbers, ten is designated by the letter A, and eleven by the letter B.

The several versions of this solitaire puzzle game involve sliding colorful tiles in a square formation to form sums and differences. Some versions are easy, some are hard, some are in between. One included manual presents the basics of all the versions of the game. Another set of manuals included presents the details of each version. They vary in which tiles are available and which of their merges are allowed. As you merge more tiles and your totals increase, you may find yourself being awarded bonus tiles, whose values help you build even higher values. When a game is over, your total score is displayed.


## Version history (last 3 releases)

### 2.0 (1) — 2026-09-06

Minor fixes plus two new versions, which involve subtraction.

### 1.5 (1) — 2026-09-04

Adjustments to display and a few rules

### 1.0 (1) — 2026-09-04

No release notes.

## More apps by Paul Rapoport

- [DozClock](https://appshunter.io/ios/app/dozclock/id6762022445)
- [DozAlarm](https://appshunter.io/ios/app/dozalarm/id6762026397)
- [DozWeather](https://appshunter.io/ios/app/dozweather/id6762027706)
- [DozStopwatch](https://appshunter.io/ios/app/dozstopwatch/id6762029322)
- [DozTimer](https://appshunter.io/ios/app/doztimer/id6762030620)
- [DozWeatherPlus](https://appshunter.io/ios/app/dozweatherplus/id6764728955)

All apps by Paul Rapoport: https://appshunter.io/developer/1892500767

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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 2026-09-09.*