rop vs PRISM
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
rop
A polished and mind-bending puzzle game featuring a minimalist design. It offers a new puzzle experience with 198 challenging levels.
- Minimalist puzzle game
- Mind-bending levels
- Extraordinary design
- 198 levels
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New, polished, mind-bending, minimal puzzle game with dozens of levels and extra-ordinary design.. Features: - Beautifully crafted minimal puzzle game - 198 mind bending levels Get ready for the new puzzle experience..
PRISM
A logic puzzle game where players manipulate light beams by rotating pieces to illuminate crystals with specific colors. It features 240 unique, machine-proven puzzles across six chapters, teaching real optics principles.
- Light beam manipulation
- Color matching puzzles
- 6 chapters with 240 levels
- Real optics principles
- No ads or in-app purchases
- Offline play
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Tap, and the light bends. PRISM is a puzzle with exactly one rule. Tap a piece and it turns 90 degrees; the light instantly finds a new path. Light every crystal with precisely the color it asks for, all at once, and the board is solved. The controls need no explanation — one tap is all there is. If you want to know how light actually works, that is in here too. ■ Six chapters, 240 puzzles I. Reflect — mirrors turn light by 90 degrees II. Split — a half-silvered mirror passes light and reflects it at once III. Disperse — a prism breaks white light into red, green and blue IV. Mix — two beams meeting at one crystal become a new color V. Refine — filters keep only what you want. Overshoot and you fail VI. Converge — everything you have learned, on one board ■ Every puzzle has exactly one answer All 240 levels were machine-proven to have precisely one solution before shipping. No configuration works by accident, and no piece is decoration — rotate any of them and the solution breaks. The par shown on each level is not an estimate either; it is the true minimum, found by exhaustive search. ■ Nothing gets in your way · No ads · No in-app purchases · No account, no sign-in · No networking — the app never asks for internet access · No data collected · No lives, no energy, no timers · No locked levels — stuck? just move on to the next one You buy it once. That is the whole transaction. ■ This is real optics The angle of reflection, dispersion through a prism, additive color mixing, selective absorption in a filter — every rule in this game comes from real physics. Entering a new chapter shows you the principle behind it on a single card. Tap once to dismiss it, or read them all later under "How light works". It also states plainly where the game simplifies the physics. ■ If color is hard for you to tell apart Every crystal carries its required color as a shape as well. Red is a triangle, green is a square, blue is a circle. A yellow crystal shows a triangle and a square side by side. You can finish every puzzle in this game without seeing color at all. ■ About the sound The pitch of each rotation depends on where the piece sits on the grid — higher toward the top, lower toward the bottom. Solving a puzzle turns your hand into a short melody. It only uses a pentatonic scale, so no order of taps can sound wrong. Turn the sound off and haptics take over the same job. ■ It is light Nothing you see or hear was authored as a file. Apart from the app icon there are no images and no audio inside; every beam of light and every note is computed as you play. All 240 puzzles compress to 9 KB of data.
Screenshots
Verdict
The clearest difference is review sentiment: PRISM at 100% against rop's 64%. PRISM also leads on update cadence (every 4 days vs monthly) and chart position (#200 vs unranked). rop's advantage is price ($0.99 vs $1.99) and iOS requirement (8.0 vs 15.0). On ads, in-app purchases, monetization model 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
rop costs $0.99 and PRISM $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
rop ships an update monthly, PRISM every 4 days. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.
| Parameter | rop | PRISM |
|---|---|---|
| Price | $0.99 — better | $1.99 |
| Rating | 4.2 (18 ratings) — better | — |
| Positive reviews | 63.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 18 — better | — |
| Update frequency | Monthly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | — | #200 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 25 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | GAMEBRAIN YAZILIM TEKNOLOJILERI ANONIM SIRKETI | 에이드리븐 주식회사 |
Customer experience
rop
PRISM
Bugs and requests
rop
Reported bugs
2 issues- Inability to restore in-app purchases
- Game freezes or crashes on certain devices
Requested features
4 requests- Add a hint system or tutorial for new players
- Implement cross-device progress sync
- Increase game board size for better visibility
- Add more variety in puzzle types and gameplay
PRISM
Not enough reviews yet to summarise bugs or requests.
In-app purchases
rop
No in-app purchases
PRISM
No in-app purchases









