Comparison

UMA Abacus vs Star Exploration

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

UMA Abacus

Features
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Use iPad or iPhone as abacus to learn traditional abacus method. It is easy and fun. We have used iPad to teach abacus for more than 10 years. It is the easiest way of learning abacus. With iPad virtual abacus, we can customise the syllabus for each student with his own version. We will always provide the most efficient syllabus for each kid and they can alway learn with the optimal speeds. With iPad virtual abacus, we can build a learning path for the kid that is easier to follow up and you will not easily get stuck with the books as the only tool like the traditional method of learning abacus.

About

Star Exploration

Features
Read full description

1. About Star Exploration Star Exploration is a novel and interesting game of reasoning. The star map is divided into multiple star regions, some of which have a planet with a color of red, yellow, and blue. The purpose of the game is to gather three planets of different colors together through movement, and there is only one aggregated planet in each sector area divided from the center of the circle. 2. How to Play a. Move: Each planet can only move up to one step. The blue planet can move diagonally by one grid, the green planet can move left and right or up and down by one grid, and the red planet can move up, down, left and right by two grid. b. Zoom: Click the + - button to zoom in or out on the star map. Drag and drop star map in the blank space. c. Undo: click the UNDO button in the upper right corner. d. Hint: click the HINT button right above.

Screenshots

UMA Abacus4 screens
Star Exploration3 screens

Verdict

The call

The clearest difference is in-app purchases: UMA Abacus at none against Star Exploration's 1. UMA Abacus also leads on update cadence (every 3 weeks vs every 10 months). On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Star Exploration sells 1 one-off in-app purchase. UMA Abacus asks for nothing beyond the download.

UpkeepUpdate frequency

UMA Abacus ships an update every 3 weeks, Star Exploration every 10 months. The most recent releases landed on September 17, 2026 and September 20, 2026 respectively.

Scorecard2 real differences · 4 level
UMA Abacus versus Star Exploration: the parameters behind the verdict, then further details
ParameterUMA AbacusStar Exploration
PriceFreeFree
Update frequencyEvery 3 weeks — betterEvery 10 months
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS15.615.6
Further details — not scored
Size73 MB5 MB
Age rating4+4+
Developershuihua zhu振华 许

In-app purchases

None

UMA Abacus

No in-app purchases

1 purchases

Star Exploration

One-time1
  • Full Version$0.99

Questions

Is UMA Abacus free?
UMA Abacus is free to download, with no in-app purchases.
Is Star Exploration free?
Star Exploration is free to download, with in-app purchases available.
Do UMA Abacus or Star Exploration have ads?
Neither UMA Abacus nor Star Exploration shows ads.
Which is updated more often, UMA Abacus or Star Exploration?
UMA Abacus ships an update every 3 weeks, and Star Exploration every 10 months. Most recently, UMA Abacus was updated on September 17, 2026 and Star Exploration on September 20, 2026.

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