Comparison

Physics Questions vs Critical Friend

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

Head to head
About

Physics Questions

Features
Read full description

Best tool for school or college for practising all those physics questions! This app will help you to learn about the different concepts in physics. With separate modules for each subject area, you can practice: ---> Electricity ---> Electronics ---> Electromagnetism ---> Force & Energy ---> Motion ---> Optics ---> Radioactivity & Thermodynamics ---> Special Relativity ---> Waves & Particles At the press of a button, you can be prompted with the correct formula as well as being shown the worked solution. Want a feature to be added? Let me know at apps@sionnagh.com

About

Critical Friend

Features
Read full description

Critical Friend is a thinking companion for ages 7โ€“14. Powered by AI, it uses the Socratic method to ask the questions that help children think more deeply, about their homework, about the news, about the world around them. A conversation that goes somewhere Every pathway starts with a warm, curious question and builds into a genuine exchange of ideas. Critical Friend never lectures and never gives the answer. Instead, it listens, challenges, and helps your child find their own conclusions. My Thinking documents After a conversation, children can create a My Thinking document โ€” a beautifully designed PDF that captures their thinking journey. Add a title, a cover photo, photos of completed work, and share it straight to a teacher or keep it as a record of learning. It's the kind of thing you'll want to stick on the fridge. Seven pathways to deeper thinking โ€” Homework: talk through completed work and understand it more deeply โ€” News: make sense of the world and develop media literacy โ€” Experience: reflect on a trip, event or moment that mattered โ€” Activity: design a game or activity around something you love โ€” Reading: explore a book chapter by chapter โ€” Image explore: photograph something interesting and follow the ideas wherever they lead โ€” Daily challenge: a fresh thinking prompt every day Built for children, trusted by parents, loved by teachers Critical Friend is designed with child safety at the centre. There are no ads, no social features, and no data sharing. Parents have their own dashboard to review every conversation, manage profiles, and set limits. Flexible pricing Five free conversations per child per month โ€” enough to explore. Upgrade to Premium for unlimited thinking across up to five children, or add a conversation top-up whenever you need it. https://www.criticalfriend.app/terms https://www.criticalfriend.app/privacy-policy

Screenshots

Physics Questions4 screens
Critical Friend4 screens

Verdict

The call

The clearest difference is ads: Critical Friend at none against Physics Questions's shown. Critical Friend also leads on update cadence (every 2 days vs every 4 days). Physics Questions's advantage is iOS requirement (12.0 vs 26.2). On price, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Physics Questions sells 9 one-off in-app purchases and Critical Friend sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Physics Questions ships an update every 4 days, Critical Friend every 2 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard3 real differences ยท 3 level
Physics Questions versus Critical Friend: the parameters behind the verdict, then further details
ParameterPhysics QuestionsCritical Friend
PriceFreeFree
Update frequencyEvery 4 daysEvery 2 days โ€” better
AdsYesNo โ€” better
In-app purchasesYesYes
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS12.0 โ€” better26.2
Further details โ€” not scored
Size20 MB15 MB
Age rating4+4+
DeveloperMichael ToddMatthew Phillips

In-app purchases

9 purchases

Physics Questions

One-time9
  • Electricity Questions$1.99
  • Electronics Questions$1.99
  • Electromagnetism Questions$1.99
Show 6 more
  • Force & Energy Questions$1.99
  • Motion Questions$1.99
  • Optics Questions$1.99
  • Radioactivity & Thermodynamics$1.99
  • Special Relativity Questions$1.99
  • Waves & Particles Questions$1.99
2 purchases

Critical Friend

Subscriptions1
  • Critical Friend Premium$5.991 Month
One-time1
  • 20 Extra Conversations$2.99

Questions

Is Physics Questions free?
Physics Questions is free to download, with in-app purchases available.
Is Critical Friend free?
Critical Friend is free to download, with in-app purchases available.
Do Physics Questions or Critical Friend have ads?
Physics Questions shows ads; Critical Friend does not.
Which is updated more often, Physics Questions or Critical Friend?
Physics Questions ships an update every 4 days, and Critical Friend every 2 days. Most recently, Physics Questions was updated on November 3, 2026 and Critical Friend on October 31, 2026.

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