Cidna
فا Get the app

Your money, finally calm.

Income, spending, budgets, piggy banks and debts in one Android app — in Persian or English, with the Jalali calendar and Toman. Completely free, end-to-end encrypted, and it keeps working offline once you’ve signed in.

  • Free, no ads
  • End-to-end encrypted
  • Offline after sign-in
Get it on MyketComing soonGet it on Cafe BazaarComing soonDirect download (APK)Coming soon
Cidna home screen: total balance, income and expenses, savings piggy banks and spending limitsCidna home screen: total balance, income and expenses, savings piggy banks and spending limits Your balance at a glance A piggy bank per goal A limit for every category

Real screenshot of the dark theme (sample data)

Three promises we can show you

Not slogans — each one is in the app’s code and written into the privacy policy.

End-to-end encryption

Your financial records are locked on the phone before anything is uploaded. The key is created on your device and never leaves it in the clear; the server keeps only ciphertext that neither we nor anyone who breaks into the server can read.

Your password and recovery key are never sent to the server. Because the lock depends on your password, choose a long, unique one. Exact scope and limits

Completely free

No subscription, no in-app purchases, no ads. You don’t even need an account — guest mode works from the first second. The code is open source.

Works offline once you’re in

Create an account and sign in once; from then on, recording, budgets, piggy banks, debts and analytics run on the phone itself, even with no connection. Everything syncs when you’re back online.

Everything you need to manage your money

From logging a coffee to saving for a goal — fast, Persian-first and private.

Start without an account

Guest mode with a passcode or fingerprint. Later, move your data into a new account or start fresh.

Fast entry

Quick-add shortcut, voice entry and a pending-transaction review — logging takes seconds.

Savings piggy banks

One piggy bank per goal, with deposits, withdrawals and scheduled monthly deposits.

Spending limits

Set a limit per category and stay under it with progress bars and alerts.

Debts & receivables

Counterparties, partial payments, due dates and reminders — no more debts lost in chats.

Jalali, Toman, true RTL

Jalali or Gregorian dates, Toman or Rial amounts, Persian and English UI — native, not an afterthought.

Export & share

PDF and Excel export, plus shareable transaction cards that follow the app’s language and currency.

Lock & devices

App lock, biometric sign-in, a device list with remote sign-out and new-device alerts.

All features

From first tap to several phones

  1. Try itOpen the app as a guest — nothing to sign up for.
  2. Create an accountWith your phone number and an SMS code. After the first successful sign-in it works offline too.
  3. DecideIf you have guest data, we ask once: move it to the new account, or start fresh?
  4. Keep your recovery keyShown once — your only way back if you forget the password.
  5. Go multi-deviceSign in on another phone and get an alert for every new device.

Honestly: what does our encryption cover?

We only claim what we can show — which is why we don’t say “zero-knowledge”.

End-to-end encrypted

  • Transactions and categories
  • Budgets and spending limits
  • Debts, receivables and savings goals
  • The on-device database is encrypted too (SQLCipher)

Not covered by it

  • Phone number and profile fields — the service needs them to work
  • Device list, timing and size of sync traffic
  • If you lose both password and recovery key, synced data can’t be recovered

Read the full security model

Get Cidna now

For Android 8 and up. Download links go live here the moment they’re published.

Get it on MyketComing soonGet it on Cafe BazaarComing soonDirect download (APK)Coming soon

Frequently asked questions

Is Cidna really free?

Yes, completely. Cidna has no subscription, no in-app purchases and no paid tier, and it shows no ads. The code is open source under AGPL-3.0-or-later.

Can I use the app offline after signing in?

Yes. After you create an account and sign in successfully once, your records live on the phone, so recording transactions, browsing history, budgets, piggy banks, debts and analytics all work without internet. Changes sync the next time you’re online.

Note: creating an account, the first sign-in and syncing need internet. If you remove a device from your account remotely, that device finds out the moment it goes online.

Is my data end-to-end encrypted?

Yes — for your financial records. Transactions, categories, budgets, debts and savings goals are encrypted on the phone with AES-256-GCM before upload. The key is generated on your device and leaves it only in wrapped form. Your password and recovery key are never sent to the server, so neither we nor an attacker who compromises the server can open your data without guessing your password.

Scope matters: the details the service needs to run (such as your phone number and device list) are not covered by this encryption. Full details are on the Security page.

Do I have to sign up to start?

No. Guest mode works with no account and no phone number, protected by a passcode or fingerprint. Create an account whenever you like and choose whether to move your guest data into it or start fresh.

What if I lose my password or recovery key?

If you only forget the password, the recovery key gets you back in. It is shown just once at the end of sign-up, so store it somewhere safe. If you lose both, synced data can’t be recovered — that is the flip side of end-to-end encryption.

Does Cidna connect to my bank account?

No. Cidna isn’t connected to any bank account or payment system and never moves money. It’s a record-keeping tool.

All questions