PolyFill vs X Lines
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
PolyFill
A brain-training puzzle game where you race against the clock to assemble geometric shapes. Earn points based on difficulty and speed, and compete on leaderboards. Unlock additional complexity and scoring through optional in-app purchases.
- Brain-training puzzles
- Timed challenges
- Geometric shape assembly
- Scoring based on difficulty and time
- Game Center leaderboards
- Achievement awards
- In-app purchases for complexity
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Exercise your brain by racing against the clock to build different geometric shapes from assorted puzzle pieces. Points are awarded based on degree of difficulty and time taken to complete the puzzle. Optionally logging into Game Center allows you to publish your score to a leaderboard and earn achievement awards. Additional game complexity and scoring opportunity can be purchased from within the game.
X Lines
This puzzle game challenges your geometric thinking and reasoning skills. Uncross lines by moving nodes to create a clear path. It offers over 200 levels with more planned, suitable for all ages.
- Geometric thinking puzzles
- Over 200 levels
- Clean UI design
- Reasoning and creativity challenges
- Supports iPhone and iPad
- Suitable for all ages
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X Lines is a great geometric thinking and brain exercise puzzle game that will bring you a lot of fun. The clean UI design let you focus on solving puzzles. You need to complete the game with power of reasoning, creativity, and imagination! A lot of challenges! FEATURES: - More than 200 well-designed levels (more levels will be continue to be added). - Both iPhone and iPad are supported - Suit for all age HOW TO PLAY: Just move the nodes so as to uncross the lines and make sure that they don't overlap. Make all lines uncrossed (light blue) to win. Enjoy!
Screenshots
Verdict
The clearest difference is rating: X Lines at 5.0 against PolyFill's 2.3. X Lines also leads on ads (none vs shown) and update cadence (every 6 days vs every 6 months). On price, ratings volume, 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. PolyFill sells 3 one-off in-app purchases and X Lines sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
X Lines holds the better App Store score, 5.0 against 2.3. Both are backed by a comparable volume of ratings — 3 and 2 respectively.
PolyFill ships an update every 6 months, X Lines every 6 days. The most recent releases landed on October 6, 2026 and October 2, 2026 respectively.
| Parameter | PolyFill | X Lines |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (3 ratings) | 5.0 (2 ratings) — better |
| Number of ratings | 3 — better | 2 |
| Update frequency | Every 6 months | Every 6 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 15 MB | 11 MB |
| Age rating | 17+ | 4+ |
| Developer | Kelly Technology Inc. | 景灯 梁 |
Customer experience
PolyFill
X Lines
In-app purchases
PolyFill
- Remove ads.$1.99
- Unlock level 2$1.99
- Unlock level 3$1.99
X Lines
- Ads removal$2.99
