Comparison

Rightful Ruler vs Combinations & Probabilities

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

Head to head
About

Rightful Ruler

This augmented reality tool simplifies distance measurements for tabletop wargames. Measure between bases, create custom paths, and visualize unit auras. It also offers experimental shared AR sessions for collaborative play.

Highlights
  • AR measurement
  • Base-to-base distance
  • Custom path measurement
  • Aura visualization
  • Shared AR sessions
Read full description

Rightful Ruler is an augmented reality measurement tool for tabletop wargames such as Warhammer 40k. Measure around or through terrain easier than ever before using AR. - Base-to-base: Select two bases to automatically measure the distance from edge to edge. - Custom paths: Start from one base and draw your own path to measure. - Auras: Easily overview what is in range without any additional measurements needed. - Shared AR: Instantly join into a shared measurement session by scanning the QR code of another player. (experimental) Terms of use: https://matterless.com/rightfulruler-eula Privacy policy: https://matterless.com/privacypolicy

About

Combinations & Probabilities

Features
Read full description

Combinations & Probabilities puts the full power of discrete mathematics in your pocket — instantly. Whether you're a student, educator, analyst or simply curious about the real odds of anything, this is your precision toolkit. Beautifully designed for iOS 26 with Liquid Glass, supporting dark and light modes. CALCULATORS Combinations and permutations — with or without repetition — plus factorial, all powered by a prime-factorized fraction engine for exact, simplified results. Live calculation updates in real-time as you move the sliders. No loading, no waiting. Just math. PROBABILITY ENGINE Type favorable and total outcomes directly, or pipe your combination result into the probability calculator with a single tap. P(A) = m/n, calculated instantly. SCENARIOS Jump into pre-configured probability models — no setup required: · Lottery Models — real draws from the Americas and Europe. See how odds shift when you play 7 numbers instead of 6. · Dice — single or multiple dice, any target outcome. · Coins — exact odds for any head/tail sequence. HISTORY Tap copy on any result to save it to your history and clipboard simultaneously. Recall, reuse or delete individual entries. Up to 200 saved calculations in Pro — enough for the most demanding sessions. SMART INPUT Sliders for broad sweeps. Step controls — and + for precision. Input validation prevents mathematically impossible states — you simply can't break it. —— C&P Pro is a one-time purchase that removes ads and unlocks all current and future features forever. No subscription. No recurring charges. Pay once, yours forever. All purchases are processed by Apple and subject to Apple's Terms of Sale: https://www.apple.com/legal/internet-services/itunes/ —— Available in English, Portuguese, Spanish, French, Italian and German.

Screenshots

Rightful Ruler3 screens
Combinations & Probabilities4 screens

Verdict

The call

The clearest difference is ads: Rightful Ruler at none against Combinations & Probabilities's shown. Rightful Ruler also leads on iOS requirement (12.0 vs 26.0). Combinations & Probabilities's advantage is update cadence (weekly vs every 2 months). On price, in-app purchases 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. Rightful Ruler sells 2 in-app purchases, starting at $2.99 per month and Combinations & Probabilities sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Rightful Ruler ships an update every 2 months, Combinations & Probabilities weekly. The most recent releases landed on October 11, 2026 and October 19, 2026 respectively.

Scorecard3 real differences · 7 level
Rightful Ruler versus Combinations & Probabilities: the parameters behind the verdict, then further details
ParameterRightful RulerCombinations & Probabilities
PriceFreeFree
Rating3.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 2 monthsWeekly — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPod — betteriPhone
Requires iOS12.0 — better26.0
Further details — not scored
Size135 MB33 MB
Age rating4++4
DeveloperAuki Matterless LimitedJoao Carrion

In-app purchases

2 purchases

Rightful Ruler

Subscriptions1
  • Premium$2.991 Month
One-time1
  • Lifetime Pass$79.99
1 purchases

Combinations & Probabilities

One-time1
  • C&P Pro$2.99

Questions

Is Rightful Ruler free?
Rightful Ruler is free to download, with in-app purchases available.
Is Combinations & Probabilities free?
Combinations & Probabilities is free to download, with in-app purchases available.
Do Rightful Ruler or Combinations & Probabilities have ads?
Combinations & Probabilities shows ads; Rightful Ruler does not.
Which is updated more often, Rightful Ruler or Combinations & Probabilities?
Rightful Ruler ships an update every 2 months, and Combinations & Probabilities weekly. Most recently, Rightful Ruler was updated on October 11, 2026 and Combinations & Probabilities on October 19, 2026.

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