1. Make exactly 24
Use every original number exactly once. Select one tile for a transformation such as √ or !. Select two tiles for +, −, ×, or ÷; the operator tray shows the actual operand order.
Support
How can we help?
24++ works offline for free puzzles and stores progress and preferences on your device. These answers cover the most common questions.
Gameplay guide
Select, sweep, and combine
2. Tap or sweep to select
Tap tiles one at a time, or keep your finger down and sweep through the tiles you want. Selected tiles show operand 1, 2, 3, or 4. A straight diagonal selects the two diagonal endpoints; draw a clear bend into a side tile when you want to include it. Sweeping only adds selections, so tap a tile to correct or remove it.
3. Operate on several tiles
Turn on Multi-Select Operations in Settings to select up to four tiles. After selecting three or four, tap +, −, ×, or ÷ once. The app calculates in selection order: selecting 8, 3, 2 and then − makes (8 − 3) − 2; ÷ works the same way. One Undo restores the whole chain. When the setting is off, you can select at most two tiles.
Common questions
Hints, purchases, and settings
Hints and answers
Hints reveal progressively. If Allow Full Answer is enabled in Settings, the verified worked answer becomes available after all hints. Viewing it marks that solve as assisted.
Restore Full Lab
Open the Full Lab purchase screen and choose Restore Purchases. Use the same Apple Account that bought Full Lab. A network connection may be needed while Apple verifies the entitlement.
Family Sharing
Full Lab supports Apple Family Sharing. Family members must belong to the same Apple family group, have purchase sharing configured by Apple, and use a storefront where the item is available.
Language and appearance
Open Settings to choose System, English, Simplified Chinese, or Japanese, and Automatic, Day, or Night appearance. Changes apply immediately and stay on this device.
Reset local data
Deleting the app removes its locally stored puzzle progress and preferences. A Full Lab purchase can later be restored from Apple; local solve history cannot be restored.
Still need help?
Email [email protected]. Include your device model, iOS or iPadOS version, app version, and steps to reproduce. Do not include passwords or payment details.