Comparison

Physical Constants vs Physics by Voice

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

Head to head
About

Physical Constants

Access a comprehensive list of physical constants, organized by category for easy searching. This app supports all AppStore languages and allows users to report corrections via email.

Highlights
  • Physical constants database
  • Categorized by topic
  • Search functionality
  • Multi-language support
  • User feedback for corrections
Features
Read full description

Application that displays the physical constants. Classified by category, easy to search. Supports all languages ​​in the AppStore. If you find something to be corrected, please send an E-mail (English or Japanese).

About

Physics by Voice

Features
Read full description

Physics by Voice is an interactive mechanics course built around an original step-by-step teaching method. The course begins with the most fundamental questions: what “where” means, how a coordinate and a reference frame describe position, and how motion is represented as a change in position. It then introduces velocity, acceleration, forces, Newton’s laws, work, and energy one concept at a time. The app includes: • 18 sequential mechanics lessons • Spoken explanations and questions • Speech recognition for answers • Clear coordinate, vector, and force diagrams • Practice problems with detailed solutions • Russian and English languages • Progress stored locally on the device • No advertising and no in-app purchases Course topics include: • Foundations of physical quantities and formulas • Kinematics and reference frames • Vectors, free fall, and circular motion • Dynamics and Newton’s laws • Gravitation, weight, and weightlessness • Pressure and Archimedes’ principle • Momentum, friction, and torque • Center of gravity and equilibrium • Work, power, kinetic energy, and potential energy Microphone and speech-recognition access are used only for voice interaction. The app has no user accounts, advertising, or developer-operated data collection.

Screenshots

Physical Constants2 screens
Physics by Voice4 screens

Verdict

The call

The clearest difference is ads: Physics by Voice at none against Physical Constants's shown. Physical Constants's advantage is iOS requirement (12.0 vs 15.0). 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. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences · 8 level
Physical Constants versus Physics by Voice: the parameters behind the verdict, then further details
ParameterPhysical ConstantsPhysics by Voice
PriceFreeFree
Rating3.3 (3 ratings) — better—
Positive reviews33.3% of reviews—
Number of ratings3 — better—
Update frequencyEvery 9 months—
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size25 MB4 MB
Age rating4+4+
DeveloperTakuya IshikawaAishat Perez

In-app purchases

None

Physical Constants

No in-app purchases

None

Physics by Voice

No in-app purchases

Questions

Is Physical Constants free?
Physical Constants is free to download, with no in-app purchases.
Is Physics by Voice free?
Physics by Voice is free to download, with no in-app purchases.
Do Physical Constants or Physics by Voice have ads?
Physical Constants shows ads; Physics by Voice does not.

Other comparisons