Private Calendar: Secret Vault

Private Calendar keeps contacts, diaries, notes, photos and files in a separate encrypted space on your phone, protecting your personal information and your privacy in close relationships.

Reduce the collection, sharing and exposure of personal information

Your contacts, private thoughts and personal records should not become data for other apps to collect, or information used for unwanted marketing or scams.

Private Calendar does not add private contacts to your phone's system address book. Diaries, notes and imported files stay in the app's own encrypted space. For information stored only here, other apps cannot read it simply by having system contacts or ordinary file access permissions. The app does not upload this content to the cloud, use it for advertising profiles or share it with data platforms.

These features share one purpose: reducing routes for personal information to leak and be misused for harassment or scams. Use it as an encrypted diary to write down your secrets, or to keep contacts, notes and files you do not want to hand over to other apps and cloud services.

Keep your own space in a controlling relationship

If a parent, someone you are dating or your partner regularly checks your phone and demands to see your contacts, diary or personal records, you still have a right to privacy.

Private Calendar looks and works like an everyday calendar. Tap your chosen sequence of four dates to enter your private space. The calendar provides a discreet entrance, while local encryption protects the contents, giving your thoughts, contacts and records a place of their own.

If friends or family need to protect personal information, or face repeated phone checks and interference with their privacy, please introduce Private Calendar to them privately.

Limited distribution to preserve discretion

We do not want endless expansion to make Private Calendar an instantly recognisable vault. Once worldwide full-version purchases reach two million, we plan to stop new full-version sales and new-user downloads on Google Play. Existing permanent unlocks will remain valid.

Based on ITU's 2025 estimate of 6 billion Internet users, this planned scale is about 0.033%, or one full copy per roughly 3,000 people. This is a global comparison, not actual ownership among people around you.

Five-day trial. One-time permanent unlock.

Your five-day (120-hour) private-space trial starts when you first finish setting your date password. It does not automatically become a paid plan or charge you. A one-time purchase permanently unlocks full use, with no subscription.

After the trial, browsing and editing private content require purchase. Expiry does not delete encrypted data, and the public calendar remains available. New purchases are offered only while sales remain open. Existing buyers can restore purchases with the Google account used for the original purchase.

Saving and viewing private content works offline. Google Play handles purchases and restoration, which may require internet access. The price shown on the purchase screen applies.

Password and data information

Remember your date password: it cannot be recovered. Without it, you cannot reopen the corresponding private-space data.

Importing creates a private copy. You choose whether to keep or delete the original. Importing does not automatically delete existing information in system contacts, your gallery, other folders or the cloud.

Uninstalling the app or clearing app data removes locally stored content. Restoring a purchase restores your paid entitlement, not lost local data.