Comparison

Unfog vs HeyKids.ai

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

Head to head
About

Unfog

Features
Read full description

Stop rereading the same chapter and hoping it sticks. Unfog turns lectures, PDFs, and videos into real understanding β€” you explain in your own words, and the app shows exactly what still needs work. The Feynman method, built for your phone: add material, explain it simply (as if to a friend), get honest feedback on gaps, then revise with quizzes, flashcards, and mind maps. WHAT YOU GET β–Έ Learn by explaining β€” voice or typed answers β–Έ Honest gap feedback β€” strengths and weak spots, so revision stays focused β–Έ Smart notes β€” clear summaries from your source material β–Έ Quizzes and flashcards β€” generated from your topic, in your language β–Έ Mind maps β€” see how ideas connect at a glance β–Έ Many sources, one place β€” PDFs, scans, recordings, YouTube, links, pasted text β–Έ Shared study spaces β€” revise with others, like a group session before exams β–Έ Built for real sessions β€” mobile-first, dark mode, English and Polish HOW IT WORKS 1. Add material β€” a chapter, lecture, or lesson 2. Read smart notes to get oriented 3. Explain it simply, as if to a friend 4. Identify gaps and retry until it sticks 5. Revise with quizzes, flashcards, and mind maps Whether you are preparing for exams, learning a new skill, or revising after a meeting, the loop stays simple: capture β†’ explain β†’ fix gaps β†’ revise. Unfog Pro unlocks full access to study features. Download Unfog and find out whether you truly understand what you just read. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

HeyKids.ai

Features
Read full description

HeyKids.ai is a safe AI learning companion for children, designed to help kids think, practice, and grow through curiosity-driven conversations. Instead of simply giving answers, HeyKids.ai guides children with age-appropriate questions, hints, and short learning activities. The app encourages kids to observe, guess, explain, and try again β€” helping them build confidence while keeping the learning process active and meaningful. With HeyKids.ai, children can explore topics they are curious about, practice language and thinking skills, and interact with friendly AI characters in a safe learning environment. What kids can do with HeyKids.ai: Explore interesting questions about the world Practice speaking, thinking, and explaining ideas Learn through guided hints instead of instant answers Build curiosity, confidence, and independent thinking Interact with child-friendly AI characters and activities Designed for children ages 6–12 HeyKids.ai uses simple language, warm guidance, and age-appropriate responses. The experience is built around meaningful learning, not passive screen time. Built for parents Parents can follow their child’s learning experience and support their growth with more visibility into what their child is curious about, where they practice, and how they engage. HeyKids.ai is not just an answer app. It is a learning companion that helps children stay curious, think deeply, and express ideas in their own words. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Unfog4 screens
HeyKids.ai4 screens

Verdict

The call

The clearest difference is update cadence: Unfog at every 2 days against HeyKids.ai's every 5 days. HeyKids.ai's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Unfog sells 3 in-app purchases, starting at $2.99 per 7 days and HeyKids.ai sells 1 in-app purchase, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Unfog ships an update every 2 days, HeyKids.ai every 5 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard3 real differences Β· 3 level
Unfog versus HeyKids.ai: the parameters behind the verdict, then further details
ParameterUnfogHeyKids.ai
PriceFreeFree
Update frequencyEvery 2 days β€” betterEvery 5 days
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone, iPad, iPod β€” better
Requires iOS17.015.0 β€” better
Further details β€” not scored
Size80 MB79 MB
Age rating4+4+
DeveloperBITSEC SP. Z O.O.HEYLABS, INC

In-app purchases

3 purchases

Unfog

Subscriptions3
  • Unfog weekly$2.997 Days
  • Unfog Monthly1 Month trial$17.991 Month
  • Unfog Annual$29.991 Year
1 purchases

HeyKids.ai

Subscriptions1
  • One Month Subscription7 Days trial$3.991 Month

Questions

Is Unfog free?
Unfog is free to download, with in-app purchases available.
Is HeyKids.ai free?
HeyKids.ai is free to download, with in-app purchases available.
Do Unfog or HeyKids.ai have ads?
Neither Unfog nor HeyKids.ai shows ads.
Which is updated more often, Unfog or HeyKids.ai?
Unfog ships an update every 2 days, and HeyKids.ai every 5 days. Most recently, Unfog was updated on October 25, 2026 and HeyKids.ai on October 24, 2026.

Other comparisons