Comparison

Permutation Combination vs One Number Tools

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

Head to head
About

Permutation Combination

Easily calculate permutations and combinations for mathematics and statistics. This tool simplifies complex calculations, helping users save time and improve accuracy in exams and studies.

Highlights
  • Permutation calculations
  • Combination calculations
  • Time-saving for exams
  • Mathematical and statistical use
  • User-friendly interface
Features
Read full description

"Permutation Combination Calculator" is an application that makes it easy to perform calculations for permutations and combinations commonly used in mathematics and statistics. By using this app, even those who are not good at mathematical calculations can easily perform calculations. The app is equipped with functions for performing permutation and combinatorial calculations. In permutation calculations, you can find the number of cases where r elements are selected from n elements. Combinatorial calculations, on the other hand, allow you to find the number of cases where r elements are selected from n elements, disregarding the order. In web-based examinations with strict time limits, reducing the time spent on calculation questions can free up time to answer other questions. By allocating your time appropriately and using the "Permutation Combination Calculator", you can take the web-based examinations efficiently and accurately.

About

One Number Tools

Features
Read full description

One Number Tools — every number tool you need, in one app. Whether you're generating random numbers, sorting lists, filtering odd and even values, or exploring math concepts like Fibonacci sequences and Cartesian products, this app has you covered. Key tools: • Number generator — random ranges, weighted selection, custom sets • Sort & shuffle — arrange, randomize, or reverse any list • Filter & extract — pick odd/even, duplicates, missing values, or ranges • Math explorers — Fibonacci, arithmetic progression, ellipse curves, recursion visualizer, Cartesian product • Number games — chain challenge, homophone lookup, memory palace Simple, fast, and no accounts required. Everything about numbers, right at your fingertips. Standard Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Permutation Combination1 screens
One Number Tools4 screens

Verdict

The call

The clearest difference is in-app purchases: Permutation Combination at none against One Number Tools's 6. Permutation Combination also leads on iOS requirement (12.0 vs 17.6). One Number Tools's advantage is ads (none vs shown). On price, update cadence and device support 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. One Number Tools sells 6 in-app purchases, starting at $1.99 per month. Permutation Combination asks for nothing beyond the download.

UpkeepUpdate frequency

Permutation Combination ships an update every 2 days, One Number Tools every 3 days. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

Scorecard3 real differences · 7 level
Permutation Combination versus One Number Tools: the parameters behind the verdict, then further details
ParameterPermutation CombinationOne Number Tools
PriceFreeFree
Rating2.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 2 days — betterEvery 3 days
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.6
Further details — not scored
Size31 MB29 MB
Age rating4+4+
DeveloperHIWAZERO宇 黄

In-app purchases

None

Permutation Combination

No in-app purchases

6 purchases

One Number Tools

Subscriptions3
  • 1个月订阅$1.991 Month
  • 1周订阅$2.597 Days
  • 1年订阅$11.001 Year
One-time3
  • 1天会员$0.99
  • 1年订阅$9.99
  • 5年会员订阅$39.99

Questions

Is Permutation Combination free?
Permutation Combination is free to download, with no in-app purchases.
Is One Number Tools free?
One Number Tools is free to download, with in-app purchases available.
Do Permutation Combination or One Number Tools have ads?
Permutation Combination shows ads; One Number Tools does not.
Which is updated more often, Permutation Combination or One Number Tools?
Permutation Combination ships an update every 2 days, and One Number Tools every 3 days. Most recently, Permutation Combination was updated on November 3, 2026 and One Number Tools on November 8, 2026.

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