90° vs Mnemonics!
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
90°
This one-tap arcade game challenges your reflexes to spin a box 90 degrees, dodge falling blocks, and collect stars. Master the simple controls to survive the escalating chaos and achieve high scores.
- One-tap 90-degree rotation controls
- Collect stars, coins, and power-ups
- Unlockable box skins and trails
- Daily rewards and quests
- Game Center leaderboards and friend challenges
- In-game currency for continues
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Tap. Turn. Survive. 90° is the one-tap reflex arcade game that's impossible to put down. Tap to spin your box 90°, weave through a storm of falling blocks, and grab every star you can - one slip and it's over. How long can you last? ▶ ONE-TAP CONTROLS Anyone can play in seconds. Mastering it is another story. Every tap rotates your box - time it right to dodge, dive, and survive the chaos. ▶ STARS, COINS & POWER-UPS Snatch stars before they vanish, bank coins, and trigger game-changing power-ups: Slow-Mo, Boost, Shield, Magnet - plus the chaotic new Frenzy and Tumble. No two runs feel the same. ▶ MAKE IT YOURS Unlock dozens of box skins and trails, then transform the whole app with premium Themes and limited Seasons (Halloween and more). Your game, your style. ▶ DAILY REWARDS THAT KEEP GIVING Check in for escalating coin streaks, crush daily quests, and chase lifetime milestones that drop exclusive skins you can earn NOWHERE else. ▶ CLIMB & COMPETE Beat your best, set a NEW RECORD with a celebration to match, and rise up the Game Center leaderboards. Then send a challenge card and dare your friends to top your score. ▶ NEVER STOP Out of lives? Spend a heart, grab the unlimited-hours pass, or share for a free one and keep the run alive. Simple to learn. Brutal to master. Endlessly replayable. Tap. Turn. Survive - and prove you're the best. Download 90° free and start your streak today.
Mnemonics!
This timed object matching game is designed to enhance your memory and focus. It presents increasingly challenging patterns and colors to improve your hippocampus function and peripheral vision, leading to better memorization skills.
- Timed object matching gameplay
- Improves memory and focus
- Enhances peripheral vision
- Challenging patterns and colors
- Adjustable difficulty levels
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Welcome to Prohor's world of Mnemonics ! Are you a forgetful person? Whether it’s silly, like forgetting to do your homework, or something serious like missing a doctor’s appointment, a neglectful mindset can lead to serious damage. Well, no need to stress, this can be improved easily, while having fun. Mnemonic's intentions are to improve your hippocampus, the part of the brain storing information for memory. Therefore, forgetfulness hopefully won’t be a trouble for you anymore. Mnemonics is a timed object matching game, which challenges you with difficult patterns and colors as it goes. This is a simple game, but deceptively useful in practice. Playing this occasionally will sharpen your focus and attention. You will also be able to analyze more indirect information with an improved peripheral vision. Overall, you'll gain better memorization skills, and not just for those silly objects shown in the games. Harder levels come with brain-sweating materials. So start with the easy ones, and only when you are comfortable to move on put more stress on your brain with the harder levels. This app is developed by me, Prohor Nishat. I am only 10 years old and had to use my dad's account to publish Mnemonics for you. Hope you enjoy the playful and colorful world of Mnemonics.
Screenshots
Verdict
The clearest difference is in-app purchases: Mnemonics! at none against 90°'s 10. Mnemonics! also leads on ratings volume (5 vs 1). 90°'s advantage is update cadence (every 6 days vs every 3 weeks). On price, rating, ads and monetization model 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. 90° sells 10 one-off in-app purchases. Mnemonics! asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for 90° against 5.0 for Mnemonics!. That said, the two scores are not equally well evidenced: Mnemonics! has 5 ratings behind it against 1, so its average is the more settled of the two.
90° ships an update every 6 days, Mnemonics! every 3 weeks. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.
| Parameter | 90° | Mnemonics! |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (5 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 5 — better |
| Update frequency | Every 6 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 17 MB | 12 MB |
| Age rating | +4 | 4+ |
| Developer | Sviatoslav Fil | Nishat Majid |
Customer experience
90°
Mnemonics!
In-app purchases
90°
- 500 Coins$0.99
- Heart Pack$0.99
- Mono Theme$0.99
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- Candy Theme$0.99
- Ocean Theme$0.99
- 1,200 Coins$1.99
- 2,500 Coins$2.99
- Unlimited 1 Hour$2.99
- 6,000 Coins$5.99
- 15,000 Coins$11.99
Mnemonics!
No in-app purchases









