Zero Below Zero vs Cognito
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Zero Below Zero
A challenging puzzle game with simple mechanics but extreme difficulty. Achieve a perfect score on free levels to unlock the rest at no cost. No hints are provided, requiring strategic thinking to solve each unique circle-based puzzle.
- Extremely challenging gameplay
- Unique circle-based puzzles
- Free levels unlockable
- No hints provided
- Inspired by math puzzles
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Don’t let the cute graphics deceive you - this game is HARD. It’s so difficult, that if you get a perfect score on the free levels, you get the rest of the levels for free. The goal sounds easy - all you have to do is make each circle at least zero. The trouble is there are gazillions of moves you can make, and just one will give you a perfect score. Oh, and there are no hints. There are also no ads, subscriptions, tracking, or anything else you wouldn’t want. If you can’t achieve a perfect score on the free levels, you can always admit defeat and pay to unlock the other levels ;) This game is inspired by the dollar game maths puzzle as seen on Numberphile. Don’t expect that to help you though - Zero Below Zero has been made much more difficult!
Cognito
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Cognito Brain Training – Play Brain Games with friends, Train Your Brain, Improve Memory & Focus, Boost Your Mind Cognito is a fun and engaging social brain training app designed to enhance memory, focus, and cognitive agility. Play a variety of games with other users and your friends to challenge your brain. Track your progress and compete with users in the global leaderboard. Auto-Renewable Subscriptions: - Cognito Pro Monthly: $1.19/month - Cognito Pro Yearly: $4.99/year Manage Your Subscription: Subscriptions can be managed or cancelled at any time via your Apple ID account settings. Legal & Privacy: Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://cognito.games/privacy-policy Unlock your full potential with Cognito Pro and take your brain training to the next level!
Screenshots
Verdict
The clearest difference is update cadence: Cognito at every 3 weeks against Zero Below Zero's every 6 months. On price, ads, 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
Both are free to download. Zero Below Zero sells 1 one-off in-app purchase and Cognito sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Zero Below Zero ships an update every 6 months, Cognito every 3 weeks. The most recent releases landed on September 30, 2026 and October 9, 2026 respectively.
| Parameter | Zero Below Zero | Cognito |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (6 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 6 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.3 | 13.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 123 MB |
| Age rating | 4+ | 4+ |
| Developer | Omar Fahmy | Pushp Raj Saurabh |
In-app purchases
Zero Below Zero
- Unlock all levels$3.99
Cognito
- Cognito Pro Membership- Monthly$4.991 Month
- Cognito Pro Membership- Yearly$29.991 Year
