Tenth Room Studio
Foldlock
Press kit
Foldlock
A puzzle box game made for iPhone Duo. Your phone is the box.
Download everything (ZIP, 19.4 MB)Fact sheet
| Developer | Tenth Room Studio, an independent one-person studio by Kane Vu (@kanevu93 on X) |
| Release date | October 27, 2026 |
| Platform | iPhone, made for iPhone Duo. Plays on any iPhone with iOS 26 or later |
| Price | US$4.99, one-time purchase. No ads, no in-app purchases, no accounts, no data collected |
| Availability | 138 countries and regions, including the United States, Canada, the United Kingdom, Australia, Japan, South Korea, India, Mexico and Brazil. Not available in the European Union |
| Language | English |
| Age rating | 9+ |
| App Store | Foldlock: Puzzle Box Mystery |
| Website | tenthroomstudio.com/foldlock |
| Press contact | foldlock@tenthroomstudio.com. Review codes available for press and video creators |
In one sentence
Foldlock is a puzzle box mystery where your iPhone Duo is the box: fold it shut to read the lid, open it a crack to let the lamplight in, stand the lid up as a mirror, and lay it flat to see everything inside.
About the game
Your mother left you six folding boxes: your grandmother's jewelry box, a locksmith's ledger, a ship surgeon's case, a child's music box, a folding game board and a painting of a lighthouse. Each one locks away a letter that was never sent, and the way into the next box. Open them in order to find out why the Halcyon sank off Ashcombe Light in 1929, and where Iris Vane went.
Every puzzle is built around the way its object folds. Turn dials, slide tiles, read pinholes against the lamp, listen for the wrong note in a lullaby, and carry what you find from one box into the next.
Why iPhone Duo
Most apps treat the fold as a bigger screen. Foldlock treats the hinge as the lid of a real box. Closed, the cover screen is the top of the box, with clues that only show when it is shut. Open a crack and light falls through the gap. Open it flat and fold it back like a laptop, and the lid stands up as a mirror or a lantern. The game reads the hinge angle in a few wide steps, so it follows how people naturally hold the phone. On any other iPhone, a brass lever on the screen does the folding.
Features
- Six folding boxes, 48 puzzles
- A story told in six letters
- Three hints for every puzzle, slower to come in later boxes
- Replay any box with new answers, and a new shuffled box every day
- Six curios hidden in secret compartments
- Game Center leaderboards and 10 achievements, iCloud sync
- Some boxes have to be heard. Best with headphones
Trailer
Download the trailer (MP4, 1280 × 590, 27 s) · Vertical version (MP4, 720 × 1560). Recorded in the iPhone Duo and iPhone simulators.
Clean screenshots · iPhone Duo
Game scenes only: no captions, no buttons. Click an image for the full-resolution file (2853 × 2007, inner screen; cover screen 1398 × 2034). All clean screenshots (ZIP, 7.9 MB).
Clean screenshots · iPad
Click an image for the full-resolution file (2752 × 2064).
Clean screenshots · iPhone
Click an image for the full-resolution file (1206 × 2622).
App Store screenshots · iPhone Duo
Click an image for the full-resolution file (2853 × 2007, inner screen).
App Store screenshots · iPhone
Click an image for the full-resolution file (1320 × 2868).
Logos
About Tenth Room Studio
Tenth Room is an independent studio that makes small apps and games for iPhone. Every project is a new room: a small, focused app or game, built to do one thing well, with no ads and no tracking. Foldlock was modeled in Blender and runs in real time with RealityKit. Founder: Kane Vu, @kanevu93 on X.