Your calculator. Your equations. Your vaults.

Create a vault

1. On the calculator, tap STR.
2. Enter the equation you want to use for this vault.
3. Press = once. The calculator shows the answer and stores the vault. Wait for the orange STRD indicator, which means stored.
4. Press = again to open it.

Use an equation you can remember. The equation itself is the key, not its answer. For example, 123+123 and 200+46 both equal 246, but address different vaults. Use your own equation rather than the public demo equation.

Open an existing vault

1. Enter the exact equation you used when creating it.
2. Press = to calculate the answer.
3. Press = a second time to open the matching vault.

You do not need STR when reopening a vault. The first equals press behaves like an ordinary calculator. Opening one vault does not show a list of your other vaults.

If it does not open, clear the calculator and re-enter the original expression, including the same numbers, operators and brackets. A different expression with the same answer will not open it.

Try the demo

Enter 123+123, then press = twice. The demo contains three sample photos so you can try the gallery before adding your own files.

The demo equation is public. Create a separate vault with your own equation for private content. To remove the demo, open it and follow the destruction steps below using Destroy demo vault….

Add photos, files or a camera photo

Open the vault you want to add to first.

• Photos: tap Photos, select one or more photos or videos, then tap Import. Cancel leaves the selection unimported.
• Files: tap Files and choose one or more items using the system file picker.
• Camera: tap Camera, allow camera access when prompted, and take a photo to add directly to the vault.

Wait for the import to finish and open the imported items to check them. Files held in iCloud or another file provider may need to download first.

Importing creates vault copies. It does not delete originals from Photos, Files, cloud services or their Recently Deleted folders. If you want the originals removed, manage those copies yourself after checking the import.

Browse, zoom and delete files

Tap a gallery item to open its preview. Swipe between items. Pinch to zoom photos, and tap the preview to hide or show its controls. The vault can rotate into landscape; the calculator remains portrait.

For a single file, open its preview, use the three-dot menu and choose Delete, then confirm. For several files, return to the gallery, tap Select, select the items and tap the delete control. Confirm Delete files to remove those vault copies. Cancel leaves them in place.

Deletion removes the selected copies from this vault, not originals outside CalcLock. There is no undo. Preview support varies by file type; importing a file does not guarantee the app can display every format.

Exit, lock and change settings

Tap Exit to return to the calculator and lock the vault. Leaving the app also locks it. In Settings, you can enable Lock when placed face down as an additional way to lock.

Tap the gear inside a vault to open Settings. Change the app language with Language, or choose System language.

Hide the calculator’s Settings button

Turn on Hide settings button and confirm Hide button. Settings remains available from the gear inside any open vault. To bring the calculator button back, open a vault and turn the switch off.

If you forget every existing equation, create a new vault using STR to reach Settings. This restores access to settings, not to forgotten vaults.

Destroy one vault

1. Open the vault you want to remove and tap its Settings gear.
2. Choose Destroy this vault…, or Destroy demo vault… for the demo.
3. Choose Continue to destruction….
4. Type DESTROY and enable I understand these copies will be lost.
5. Tap Permanently destroy vault, then confirm Destroy permanently.

This permanently removes the current vault and its local files. Other vaults and originals outside CalcLock are unaffected. You can cancel before the final confirmation. There is no undo or recovery.

Reset all vaults

This is different from destroying the vault you are currently viewing: it removes every vault, including forgotten ones.

1. Open any vault and go to Settings.
2. Tap Reset all vaults….
3. Choose Continue to full reset….
4. At the final warning, choose Delete all vaults, or Keep my vaults to cancel.

The reset deletes all vaults and their local files and shows the calculator Settings button again. Originals outside the app are unaffected. It cannot be undone.

Forgotten equations, backup and changing devices

CalcLock combines your exact equation with a secret held on your device to encrypt the vault. The current version has no forgotten-equation recovery, export or portable vault backup. Support cannot recover an equation or decrypt a vault.

Keep independent originals of anything you cannot replace. Do not uninstall CalcLock as a troubleshooting step: losing the app’s stored data or the device can mean losing access to the vaults.

Read how encryption and local storage work.

Need a hand?

Contact CalcLock support. Include your device model, iOS version and what happened, but never send your vault equation or private files.