Comparison

Quadrant vs Fermi

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

Head to head
About

Quadrant

Features
Read full description

One photo, four answers, points for guessing fast: every day, Quadrant shows you a new picture – hidden, blurred, or cut into pieces. The sooner you recognize what it shows, the more points you keep. THREE GAME MODES • Mosaic: Reveal the picture tile by tile – every tile costs points. • Silhouette: The subject slowly emerges from the fog. • Fragment: Swap the shuffled pieces back into the right order. 600+ HAND-CHECKED PUZZLES Animals, architecture, artworks, food, sports, vehicles, space, and many more categories – every single image was individually selected and reviewed. All pictures ship inside the app and come from public-domain or freely licensed sources; full attributions are available right in the app. SMART HINTS INSTEAD OF LETTER COUNTING Stuck? Three hand-written hints guide you toward the subject step by step – from a subtle nudge to a clear pointer. Only the final stage reveals the first letter. Every hint costs points, so choose wisely. KEEP YOUR STREAK ALIVE • Daily puzzle – one new image for everyone, every day • Streaks, weekly goals, and badges • Archive: catch up on days you missed • Zen, timed, and weekly modes for extra rounds • A fun fact for every solved subject MADE THE HONEST WAY • No ads, no purchases, no account, no tracking • Works completely offline • Fully localized in English, German, French, and Spanish Note: The in-game hint texts are currently German-first; an English hint update is in the works. Puzzle for a minute a day or sink into Zen mode for hours – Quadrant adapts to your rhythm. Happy guessing!

About

Fermi

This game challenges you to estimate answers to complex questions without looking them up. It trains your reasoning skills by breaking down problems and making educated guesses. Compete on daily leaderboards and track your progress.

Highlights
  • Three daily estimation questions
  • Score based on proximity to the truth
  • Daily, weekly, and monthly leaderboards
  • Personal best and round history
  • Archive of past games
  • Sources for all answers
  • Metric or imperial units
Features
Currently charting
Read full description

Fermi is a daily game about getting close. Every morning you get three questions nobody can answer off the top of their head. How many baguettes do the bakeries of Paris sell before noon? How many trees are standing on Earth right now? You don't look it up. You break the problem into pieces you already know, follow a hunch, and put a number on it. Then you find out how close you landed. HOW IT WORKS • Three questions. About three minutes. • One number per question — no multiple choice, no second tries. • Your score is the multiple between your answer and the truth. 1x is spot on. Lower is better. • See where your number sits against everyone else who played today. WHY IT'S DIFFERENT Most quiz apps reward what you already memorised. This one rewards how you think. The physicist Enrico Fermi was famous for landing within an order of magnitude of almost anything using nothing but reasoning — how many piano tuners work in Chicago, how much energy a blast released judging by how far the paper scraps flew. That is the skill this app trains, and it gets sharper the more you use it. WHAT YOU GET • A fresh set of three questions every morning • A daily leaderboard, plus weekly and monthly standings • Your personal best and a running history of every round • An archive of past days, open whenever you want another round • The sources behind every answer, so you can see where the number came from • Metric or imperial units, your choice No sign-up, no email address, no ads in the middle of a question. Your first round is free; a subscription unlocks every daily round, the archive and the working behind every answer. Come back tomorrow. There is always another one. Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://fermi.begtools.xyz/privacy Questions or feedback: cytools85@gmail.com

Screenshots

Quadrant4 screens
Fermi4 screens

Verdict

The call

The clearest difference is in-app purchases: Quadrant at none against Fermi's 2. Fermi's advantage is chart position (#178 vs unranked) and iOS requirement (16.4 vs 26.4). On price, 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

Both are free to download. Fermi sells 2 in-app purchases, starting at $5.99 per 7 days. Quadrant asks for nothing beyond the download.

Scorecard3 real differences · 8 level
Quadrant versus Fermi: the parameters behind the verdict, then further details
ParameterQuadrantFermi
PriceFreeFree
Rating—4.3 (7 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—7 — better
Update frequency—Every 5 days
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Subscription
Best chart rank—#178 — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.416.4 — better
Further details — not scored
Size191 MB43 MB
Age rating4+4+
Developerlipdila's codingZEYNEP CEREN GEMICI

In-app purchases

None

Quadrant

No in-app purchases

2 purchases

Fermi

Subscriptions2
  • Fermi Subscriber Weekly$5.997 Days
  • Fermi Subscriber Annual3 Days trial$34.991 Year

Questions

Is Quadrant free?
Quadrant is free to download, with no in-app purchases.
Is Fermi free?
Fermi is free to download, with in-app purchases available.
Do Quadrant or Fermi have ads?
Neither Quadrant nor Fermi shows ads.

Other comparisons