Tengma=Teng

Privacy policy

Effective date: October 17, 2026

Tengma=Teng is an app for splitting shared expenses among friends. This page explains what data we collect, why we use it and how you can delete it.

What data we collect

  • Telegram profile — when you sign in with Telegram: your Telegram ID, name, username and a link to your profile photo. With Telegram sign-in we do not get your phone number.
  • Google account — when you sign in with Google: your Google account ID, name, verified email address and a link to your profile photo.
  • WhatsApp — only if you choose to sign in with WhatsApp: your WhatsApp number (your phone number) and WhatsApp profile name. To sign in, you send a code to our WhatsApp Business number; the message reaches us through Meta (WhatsApp Cloud API).
  • Groups and expenses — group names, expense names and amounts, who paid and who took part — entered by you or your friends in the group.
  • Card — the card number and cardholder name you add yourself. The card number is stored encrypted. We never ask for the expiry date or CVV.
  • Camera — only to scan a friend’s invite QR code inside the app; images are not stored or sent anywhere.
  • Levels (XP) — points and a level computed from your activity, such as adding expenses, paying and closing groups; shown only inside the app.
  • Technical data — sign-in times and request logs (IP address) for security.

Why we use it

  • To create your account and identify you.
  • To calculate group expenses and show who owes whom and how much.
  • To show your card to a friend who owes you so they can send you money — the full number is visible only to the person who has to pay you.

We show no ads, never sell your data and never share it with third parties for tracking.

Who can see it

Your name and the expenses you enter are visible only to members of the groups you belong to. Data is stored on servers in the European Union (Hetzner, Finland).

Deleting your account

In the app: your profile picture → Account → “Delete account”, then confirm. Without the app: send /delete to our Telegram bot (details: tengma-teng.uz/delete-account). Your sign-in links (Telegram, Google, WhatsApp), cards and device data are deleted immediately, and your name is replaced with “Deleted user”. Expense amounts in groups are kept so your friends’ balances stay correct, but they are no longer linked to you.

Children

The app is not intended for children under 13.

Changes and contact

If this policy changes, this page will be updated. Questions: mailto:[email protected].