Comparison

Protege vs Unfog

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

Head to head
About

Protege

Features
Read full description

Study Smarter—By Teaching. Protege.ai is a revolutionary learning companion that flips the script on studying. Instead of passively reviewing flashcards, you become the teacher. Your student? A real-time AI protege that listens, learns, and grows with you. Whether you’re prepping for a final, organizing your thoughts, or building deep knowledge in any field, Protege helps you retain information through active teaching. The more you teach, the more your Protege evolves into a personalized second brain—ready to recall what you’ve taught it and ready to learn more. Key Features: • Teach to Learn: Reinforce knowledge by explaining it to your Protege • Second Brain: Build a persistent AI that retains your lessons • Conversational Learning: Engage in real-time, dynamic dialogue • Review & Reinforce: Revisit what you’ve taught your Protege anytime • Flexible Topics: Teach anything—biology, history, philosophy, or your own ideas Whether you’re a student, thinker, or lifelong learner, Protege.ai transforms how you study and remember. Teach more. Forget less. Your second brain awaits.

About

Unfog

Features
Read full description

Stop rereading the same chapter and hoping it sticks. Unfog turns lectures, PDFs, and videos into real understanding — 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 ▸ Learn by explaining — voice or typed answers ▸ Honest gap feedback — strengths and weak spots, so revision stays focused ▸ Smart notes — clear summaries from your source material ▸ Quizzes and flashcards — generated from your topic, in your language ▸ Mind maps — see how ideas connect at a glance ▸ Many sources, one place — PDFs, scans, recordings, YouTube, links, pasted text ▸ Shared study spaces — revise with others, like a group session before exams ▸ Built for real sessions — mobile-first, dark mode, English and Polish HOW IT WORKS 1. Add material — 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 → explain → fix gaps → 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/

Screenshots

Protege4 screens
Unfog4 screens

Verdict

The call

The clearest difference is update cadence: Unfog at every 2 days against Protege's every 3 weeks. Protege's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, ads and in-app purchases 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. Protege sells 1 in-app purchase, starting at $3.99 per month and Unfog sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Protege ships an update every 3 weeks, Unfog every 2 days. The most recent releases landed on September 8, 2026 and September 13, 2026 respectively.

Scorecard3 real differences · 3 level
Protege versus Unfog: the parameters behind the verdict, then further details
ParameterProtegeUnfog
PriceFreeFree
Update frequencyEvery 3 weeksEvery 2 days — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better17.0
Further details — not scored
Size214 MB80 MB
Age rating4+4+
DeveloperYoseph KassayeBITSEC SP. Z O.O.

In-app purchases

1 purchases

Protege

Subscriptions1
  • Protege Subscription7 Days trial$3.991 Month
3 purchases

Unfog

Subscriptions3
  • Unfog weekly$2.997 Days
  • Unfog Monthly1 Month trial$17.991 Month
  • Unfog Annual1 Year trial$29.991 Year

Questions

Is Protege free?
Protege is free to download, with in-app purchases available.
Is Unfog free?
Unfog is free to download, with in-app purchases available.
Do Protege or Unfog have ads?
Neither Protege nor Unfog shows ads.
Which is updated more often, Protege or Unfog?
Protege ships an update every 3 weeks, and Unfog every 2 days. Most recently, Protege was updated on September 8, 2026 and Unfog on September 13, 2026.

Other comparisons