Comparison

AngularQM vs Logarithm Rules Calculator

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

Head to head
About

AngularQM

This app helps quantum mechanics physicists quickly obtain matrix representations of angular momentum operators. It calculates matrices for J squared, the z component of J, and ladder operators for chosen total angular momentum values.

Highlights
  • Matrix representation of angular momentum operators
  • Calculates J squared matrices
  • Calculates Jz component matrices
  • Calculates ladder operator matrices (J+, J-)
  • Supports various total angular momentum values (j)
  • Visualizes matrix representations
Features
Read full description

AngularQM is an application for physicists working in quantum mechanics. It allows quickly obtain the matrix representation of the operators involved in the construction of angular momentum in quantum mechanics. Once the total angular momentum of the quantum system under consideration has been chosen (j = 1/2, j = 1, j = 2, etc.) it is possible to calculate the matrices associated with the operator J squared and the z component of operator J. It is also possible to calculate and visualize the matrix representations of the ladder operators: J + and J-.

About

Logarithm Rules Calculator

Features
Read full description

Get your homework done instantly. Prepare for exams stress-free. Free, complete step-by-step solutions. Enter your values and apply logarithm rules. HOW IT WORKS Enter your values into the correct fields and get started. You’ll receive the solution instantly and can share it with friends or classmates. YOUR PERSONAL DATA We don’t need it. Only anonymized data is collected, for example: - which features are used - how many solutions are generated This helps us improve. No conclusions can be drawn about you. COSTS Everything is free to use. 24/7 access to your solutions. All solution steps are always complete. If you need many solutions in a short time, various purchase options are available. EXTRAS - Overview of all calculation rules - Curated learning videos - Feedback on incorrect inputs - Manage your own solutions - App introduction CONTACT Questions and feedback via Discord or directly in the app review.

Screenshots

AngularQM4 screens
Logarithm Rules Calculator4 screens

Verdict

The call

The clearest difference is price: Logarithm Rules Calculator at Free against AngularQM's $4.99. Logarithm Rules Calculator also leads on update cadence (every 3 weeks vs every 49 months) and iOS requirement (15.0 vs 26.4). AngularQM's advantage is in-app purchases (none vs 8). On ads 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

Logarithm Rules Calculator is free to download; AngularQM costs $4.99 up front. Logarithm Rules Calculator sells 8 one-off in-app purchases. AngularQM asks for nothing beyond the download.

UpkeepUpdate frequency

AngularQM ships an update every 49 months, Logarithm Rules Calculator every 3 weeks. The most recent releases landed on July 4, 2026 and August 17, 2026 respectively.

Scorecard4 real differences · 5 level
AngularQM versus Logarithm Rules Calculator: the parameters behind the verdict, then further details
ParameterAngularQMLogarithm Rules Calculator
Price$4.99Free — better
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 49 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS26.415.0 — better
Further details — not scored
Size5 MB182 MB
Age rating4+4+
DeveloperGabriel RaffaGlindemann, Sennoun, Langer GbR

In-app purchases

None

AngularQM

No in-app purchases

8 purchases

Logarithm Rules Calculator

One-time8
  • +30 User Tokens$0.29
  • +1 Convenience Token / 6h, max. +2$0.59
  • +2 Convenience Tokens / 6h, max. +4$0.99
Show 5 more
  • +150 User Tokens$0.99
  • +300 User Tokens$1.49
  • +4 Convenience Tokens / 6h, max. +8$1.59
  • Remove Ads$1.99
  • Lifetime Access$1.99

Questions

Is AngularQM free?
AngularQM costs $4.99, with no in-app purchases.
Is Logarithm Rules Calculator free?
Logarithm Rules Calculator is free to download, with in-app purchases available.
Do AngularQM or Logarithm Rules Calculator have ads?
Neither AngularQM nor Logarithm Rules Calculator shows ads.
Which is updated more often, AngularQM or Logarithm Rules Calculator?
AngularQM ships an update every 49 months, and Logarithm Rules Calculator every 3 weeks. Most recently, AngularQM was updated on July 4, 2026 and Logarithm Rules Calculator on August 17, 2026.

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