4=10 vs Déjà Vu
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
4=10
A casual number puzzle game for all ages. Combine four given numbers using basic math operations to reach the target of 10. It offers a relaxing experience that improves mental math skills and number familiarity.
- Combine four numbers to equal 10
- Basic math operations
- Gradually increasing difficulty
- One-handed play
- Improves mental math skills
- Relaxing and soothing gameplay
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4=10 is a simple number puzzle game suitable for all ages. The objective is to use four given numbers and combine them in an expression that equals 10. For example, you can solve it by adding 1, 2, 3, and 4 together (1+2+3+4=10). The game relies on basic math operations and starts off easy, gradually increasing in difficulty. It's designed to be a relaxed and soothing experience. You can play it with just one hand, using your phone whenever and wherever you like. By playing this game, you'll become more comfortable with numbers and improve your basic math skills, including mental calculations, using parentheses, and following the correct order of operations. Enjoy the game and happy calculating! :)
Déjà Vu
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One level. Just one. It looks easy: hit the button, reach the door, done. Then you play it again... but something has changed. Right is now left. The floor melted under your feet. The door started running the moment you got close. The second you yell "same level?!" you finally understand the game. Déjà Vu is a sneaky trap-platformer. Every run shows the exact same scene but quietly breaks one rule. Your goal never changes; the only thing that changes is the new game the level is playing on you. Each of the 70 levels is a fresh troll: reversed controls, invisible floor, rising lava, flying instead of walking, doors that flee, winning by dying, standing perfectly still to survive, swimming underwater, flipped gravity, time that moves only when you do, outrunning your own ghost, carrying a live bomb, and much more. The moment you feel certain is the exact moment you lose. Retro pixel visuals, a crisp VT323 font and smooth, instant-response controls. No ad walls, no forced interstitials. When you're stuck, tap the light bulb in the top left: if you want, watch a short rewarded ad to unlock a hint and a "Skip Level" option. But it's fully optional — with no ad available the hint is free and the flow never breaks. The choice is always yours. Features: - 70 handcrafted troll levels, each with its own rule-bending twist - Traps that change every run: reversed controls, vanishing floor, rising lava, flight, portals, underwater, flipped gravity, frozen time and more - Precise, instant-response platforming - Retro pixel art with a clean, readable font - Landscape; full iPhone and iPad support - Turkish and English - OPTIONAL rewarded ads only — NO forced or interstitial ads - Hints and optional level skip when you get stuck - Plays offline, no account or login required
Screenshots
Verdict
The clearest difference is in-app purchases: Déjà Vu at none against 4=10's 1. Déjà Vu also leads on update cadence (weekly vs every 2 months). 4=10's advantage is ads (none vs shown) and iOS requirement (12.0 vs 15.0). On price 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. 4=10 sells 1 one-off in-app purchase. Déjà Vu asks for nothing beyond the download.
4=10 ships an update every 2 months, Déjà Vu weekly. The most recent releases landed on October 10, 2026 and September 29, 2026 respectively.
| Parameter | 4=10 | Déjà Vu |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (2.6K ratings) — better | — |
| Positive reviews | 97.9% of reviews | — |
| Number of ratings | 2.6K — better | — |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 33 MB | 10 MB |
| Age rating | 4+ | 9+ |
| Developer | Sveinn Steinarsson | Ozgur Baskin |
Bugs and requests
4=10
Reported bugs
1 issue- None reported
Requested features
2 requests- Add more difficulty levels
- Introduce new gameplay modes
Déjà Vu
Not enough reviews yet to summarise bugs or requests.
In-app purchases
4=10
- 4≠10 add-on$3.99
Déjà Vu
No in-app purchases









