Comparison

Rightful Ruler vs Muster Army Builder

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

Muster Army Builder

Features
Read full description

Muster is a fast army-list builder for miniature tabletop wargames. Muster ships empty and imports the community-maintained datasets you already use, so your unit and rules data always comes from your own source — not from us. • Build legal lists — add units, set a points limit, and watch a live budget as you go. • Detachments & enhancements — pick detachments and enhancements with automatic points/slot enforcement. • Import your data — load community dataset files at runtime; nothing is bundled. • Dice roller — D3/D6/D12/D20 with history, for quick in-game rolls. • Collection tracker — record which miniatures you own and their paint status. • Campaign tracker — track your force across a narrative campaign with rank and experience progression. • AI list coaching (Pro) — a read on your list's strengths, weaknesses and swaps, or a plan for a specific opponent. • No account, no sign-up — your lists stay on your device. Muster needs a connection twice: once to download a dataset, and again if you use the AI features, which send only your list text for analysis. Everything else works offline. Muster Pro is a one-time purchase, not a subscription. It unlocks unlimited army lists (free covers one), Rate My List, matchup analysis, and all future Pro features. Not affiliated with, licensed by, or endorsed by any game publisher. For use with your own rulebooks and community data.

Screenshots

Rightful Ruler3 screens
Muster Army Builder4 screens

Verdict

The call

The clearest difference is update cadence: Muster Army Builder at every 3 days against Rightful Ruler's every 2 months. Rightful Ruler's advantage is iOS requirement (12.0 vs 18.0). On price, ads, 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 Muster Army Builder 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, Muster Army Builder every 3 days. The most recent releases landed on September 25, 2026 and October 13, 2026 respectively.

Scorecard2 real differences · 8 level
Rightful Ruler versus Muster Army Builder: the parameters behind the verdict, then further details
ParameterRightful RulerMuster Army Builder
PriceFreeFree
Rating3.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 2 monthsEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better18.0
Further details — not scored
Size135 MB6 MB
Age rating4+4+
DeveloperAuki Matterless LimitedJAMES ROBERT DE RUYTER

In-app purchases

2 purchases

Rightful Ruler

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

Muster Army Builder

One-time1
  • Muster Pro$4.99

Questions

Is Rightful Ruler free?
Rightful Ruler is free to download, with in-app purchases available.
Is Muster Army Builder free?
Muster Army Builder is free to download, with in-app purchases available.
Do Rightful Ruler or Muster Army Builder have ads?
Neither Rightful Ruler nor Muster Army Builder shows ads.
Which is updated more often, Rightful Ruler or Muster Army Builder?
Rightful Ruler ships an update every 2 months, and Muster Army Builder every 3 days. Most recently, Rightful Ruler was updated on September 25, 2026 and Muster Army Builder on October 13, 2026.

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