Cœur de Cristal
A journey of light
Free · Designed for iPad. Not verified for macOS.
200 optical puzzles whose difficulty climbs and never dips. No ads, no in-app purchases, no connection.
Guide the light to the heart of the crystal.
Sources cast coloured beams across a silent grid. Tilt the mirrors and tune the prisms so that every colour reaches the heart that calls for it. A contemplative optical puzzle: no timer, no lives, no pressure. Just light, geometry, and all the time you need.
200 LEVELS, 20 ACTS
A campaign that climbs and never dips. Every level is measured across seven dimensions — optimal move count, rarity of the solution, depth of the light path, density of mechanics, decoys — then ordered by strictly increasing complexity. Level 47 is harder than level 46. Always. No plateaus, no slumps.
TWELVE MECHANICS THAT COMBINE
• Mirrors you flip between two diagonals
• Prisms that tint the beam in passing
• Splitters that double the light
• Paired portals that teleport it
• Additive fusion: red and green make yellow, all three make white
• A spectral prism that breaks white back into its spectrum
• Chromatic gates that admit a single colour
• Sensors and linked gates, obsidian that blocks everything
The early acts introduce each piece one at a time. The last ones fit them all onto the same grid.
THREE MUSICAL MOODS
Aurore, warm. Boréale, for the night journey. Cristal, a music box. Composed layers, seamlessly looped, chosen from the title screen.
THREE STARS
Three for the optimal solution. Two if you come close. One for reaching the end — which already counts. 600 stars to gather.
ENGLISH AND FRENCH
The game follows your device's language and can be switched at any time from the title screen. Interface and level hints are both fully translated.
WHAT IT DOESN'T HAVE
No ads. No in-app purchases. No account. No connection required. The whole game is there from first launch, and your progress never leaves your device.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Pierre-Julien AVRIL, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Pierre-Julien AVRIL
- Size
- 72.5 MB
- Category
- Puzzle
- Compatibility
Requires iOS 14.0 or later and a device with the A12 Bionic chip or later.
- iPhone
Requires iOS 14.0 or later and a device with the A12 Bionic chip or later.
• iPhone XS
• iPhone XS Max
• iPhone XR
• iPhone 11
• iPhone 11 Pro
• iPhone 11 Pro Max
• iPhone SE (2nd generation)
• iPhone 12 mini
• iPhone 12
• iPhone 12 Pro
• iPhone 12 Pro Max
• iPhone 13 Pro
• iPhone 13 Pro Max
• iPhone 13 mini
• iPhone 13
• iPhone SE (3rd generation)
• iPhone 14
• iPhone 14 Plus
• iPhone 14 Pro
• iPhone 14 Pro Max
• iPhone 15
• iPhone 15 Plus
• iPhone 15 Pro
• iPhone 15 Pro Max
• iPhone 16
• iPhone 16 Plus
• iPhone 16 Pro
• iPhone 16 Pro Max
• iPhone 16e
• iPhone 17 Pro
• iPhone 17 Pro Max
• iPhone 17
• iPhone Air
• iPhone 17e
• iPhone 18 Pro
• iPhone 18 Pro Max
• iPhone Duo - iPad
Requires iPadOS 14.0 or later and a device with the A12 Bionic chip or later.
• iPad Pro (11‑inch)
• iPad Pro (11‑inch) Wi‑Fi + Cellular
• iPad Pro (12.9‑inch) (3rd generation)
• iPad Pro (12.9‑inch) (3rd generation) Wi‑Fi + Cellular
• iPad mini (5th generation)
• iPad mini (5th generation) Wi‑Fi + Cellular
• iPad Air (3rd generation)
• iPad Air (3rd generation) Wi‑Fi + Cellular
• iPad Pro (11‑inch) (2nd generation)
• iPad Pro (11‑inch) (2nd generation) Wi‑Fi + Cellular
• iPad Pro (12.9‑inch) (4th generation)
• iPad Pro (12.9‑inch) (4th generation) Wi‑Fi + Cellular
• iPad Air (4th generation)
• iPad Air (4th generation) Wi‑Fi + Cellular
• iPad (8th generation)
• iPad (8th generation) Wi‑Fi + Cellular
• iPad Pro (11-inch) (3rd generation)
• iPad Pro (11-inch) (3rd generation) Wi‑Fi + Cellular
• iPad Pro (12.9-inch) (5th generation)
• iPad Pro (12.9-inch) (5th generation) Wi-Fi + Cellular
• iPad mini (6th generation)
• iPad mini (6th generation) Wi-Fi + Cellular
• iPad (9th generation)
• iPad (9th generation) Wi-Fi + Cellular
• iPad Air (5th generation)
• iPad Air (5th generation) Wi‑Fi + Cellular
• iPad (10th generation)
• iPad (10th generation) Wi‑Fi + Cellular
• iPad Pro (11‑inch) (4th generation)
• iPad Pro (11‑inch) (4th generation) Wi‑Fi + Cellular
• iPad Pro (12.9‑inch) (6th generation)
• iPad Pro (12.9‑inch) (6th generation) Wi‑Fi + Cellular
• iPad Air 11-inch (M2)
• iPad Air 11-inch (M2) Wi-Fi + Cellular
• iPad Air 13-inch (M2)
• iPad Air 13-inch (M2) Wi-Fi + Cellular
• iPad Pro 11-inch (M4)
• iPad Pro 11-inch (M4) Wi-Fi + Cellular
• iPad Pro 13-inch (M4)
• iPad Pro 13-inch (M4) Wi-Fi + Cellular
• iPad mini (A17 Pro)
• iPad mini (A17 Pro) Wi-Fi + Cellular
• iPad (A16)
• iPad (A16) Wi-Fi + Cellular
• iPad Air 11-inch (M3)
• iPad Air 11-inch (M3) Wi-Fi + Cellular
• iPad Air 13-inch (M3)
• iPad Air 13-inch (M3) Wi-Fi + Cellular
• iPad Pro 11-inch (M5)
• iPad Pro 11-inch (M5) Wi-Fi + Cellular
• iPad Pro 13-inch (M5)
• iPad Pro 13-inch (M5) Wi-Fi + Cellular
• iPad Air 11-inch (M4)
• iPad Air 11-inch (M4) Wi-Fi + Cellular
• iPad Air 13-inch (M4)
• iPad Air 13-inch (M4) Wi-Fi + Cellular - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later and a device with the A12 Bionic chip or later.
- iPhone
- Languages
- English and French
- Age Rating
4+
- 4+
- Copyright
- © 2026 Pierre-Julien AVRIL