Privacy Policy

Most of our apps do not ask you to create an account. Barir Hisab does, as do Room Quiz and Phosphor — see their sections below. Our games and tools are playable without signing in, and in them we do not collect your name, email address, phone number or postal address unless you send them to us yourself by email.

The first exception is Room Quiz. Professors and students there sign in with an email, Google or Apple account, and we collect the name, email address and account ID that sign-in provides. Course content is also stored on our servers, not only on your device, because the app needs to show a professor's questions, and a student's answers and scores, to the people who are supposed to see them — the professor running the class and the students in it.

Phosphor is the second exception. Phosphor, the study app that turns videos and topics into notes and flashcards, signs you in anonymously at first and lets you link a Google, Apple or email account. We keep the name and email address that sign-in provides, your study content (the videos, topics and text you add, and the notes, summaries, flashcards, review history, chat questions and typed answers the app makes or you write), images you upload for image flashcards, and a scrambled device identifier that is used only to apply free limits fairly. This is stored on our servers in Google Firebase so it follows you between devices.

Barir Hisab is the third exception. Barir Hisab (বাড়ির হিসাব), a rent-ledger app for landlords and tenants, needs an account and stores your records on our server. What it collects is set out in its own section, Barir Hisab (বাড়ির হিসাব), below.

What is collected automatically, by the services listed in section 2:

• An advertising identifier — the resettable ID your phone gives to apps that show ads.
• Device and app information — device model, operating system version, language, country, app version, and crash information.
• Usage events — which screens you open and which actions you take inside the app, so we can tell which parts work.
• Purchase records — if you buy something, the store tells us that the purchase happened and what it was for. We never see your card number; the payment is handled entirely by Google or Apple.
• A push notification token — only if you allow notifications. Some apps also store a small number of gameplay values against that token so a notification can be about your game rather than a broadcast. In Kintsugi Pottery: Goldmend that is two numbers: when your kiln finishes, and how many pieces you have left unrepaired.

Your game progress is stored on your own device. It is not uploaded to us.

We use these services. Each has its own privacy policy, and each one receives only what it needs to do its job.

• Google AdMob — shows the ads. Receives your advertising identifier and coarse device information. policies.google.com/privacy
• Firebase (Google) — analytics and crash reporting, and sign-in only in apps that offer Play Games leaderboards, and in Room Quiz and Phosphor. firebase.google.com/support/privacy
• RevenueCat — records in-app purchases against an anonymous identifier that is not linked to your real identity. In Phosphor, which has accounts, purchases are recorded against your Phosphor account ID so they follow you to your other devices. revenuecat.com/privacy
• OneSignal — delivers push notifications, if you allowed them. onesignal.com/privacy_policy
• Google Cloud Vertex AI — in Room Quiz only, reads uploaded CSV files and documents so it can pull quiz questions out of them. This runs inside Teamz Lab's own Google Cloud project; it is not a shared third-party service and does not use your data to train its models. cloud.google.com/terms/cloud-privacy-notice
• OpenRouter, Google Gemini and Z.ai — in Phosphor only. When you use an AI feature, the text it needs (video captions, text you paste, a topic, your question or your typed answer) is sent to Google Gemini through OpenRouter, or to Z.ai when Gemini is busy, to produce the result. Phosphor asks your permission before it sends anything the first time, and you can turn AI features off in Settings, AI services. Each of these services has its own privacy policy.
• YouTube (Google) — in Phosphor, videos play in YouTube's official player, which YouTube runs under its own privacy policy. policies.google.com/privacy
• Google Play / Apple App Store — handle every payment. We never receive your payment details.

We do not sell your personal information, and we do not share it with anyone outside this list and the providers named in an app's own section below.

Most of our apps are free and are paid for by ads. Ads may be personalised using your advertising identifier. You can change this at any time, and the apps keep working either way:

• Android — Settings › Privacy › Ads, then Delete advertising ID or Opt out of Ads Personalisation.
• iOS — Settings › Privacy & Security › Tracking, then turn off Allow Apps to Request to Track.

Where the law requires a consent prompt before personalised ads, our apps show one and honour the answer.

Our apps are not directed at children under 13 and we do not knowingly collect personal information from them. If you believe a child has provided us with personal information, email us at the address in section 7 and we will delete it.

• Game progress — kept on your device until you delete the app or clear its data. Uninstalling removes it.
• Analytics and crash data — retained by Firebase under Google's own retention settings, which we set to the shortest period the service offers for user-level data.
• Push notification token and its tags — kept while you have notifications enabled, and removed when you turn them off or uninstall.
• Purchase records — kept for as long as the app stores require for refunds, restores and tax records.

Depending on where you live — including under the GDPR in the EU/UK and the CCPA in California — you may ask us to give you a copy of your data, correct it, or delete it. Because most of our apps do not hold accounts, the fastest routes are usually:

• Delete everything on your device — uninstall the app, or clear its storage in your phone's settings.
• Stop notifications — turn them off in your phone's settings for that app.
• Reset advertising data — see section 3.
• Ask us directly — email the address below with the app name and, if you have it, the anonymous identifier shown in the app. We answer within 30 days.

The first exception is Room Quiz. Because that app has real accounts, deleting your device does not delete your data there. Open the app, go to Settings, and choose Delete Account — this removes your account and the courses, questions and results tied to it immediately, no email needed. If you no longer have the app installed, email us at the address below and we will delete it for you.

Phosphor works the same way. Open the app, go to Settings, and choose Delete account. This removes your account and the study content tied to it from our servers. A Phosphor Pro subscription is billed by Apple or Google, so cancel it in your store account as well; deleting the account does not stop the billing.

What we collect, and why

• Your account — name and email from Google sign-in or email sign-up. Older accounts may use a mobile number and password. Used to sign you in and keep your records.
• What you record — landlords type in building and flat details, tenant names and phone numbers, guarantor name and phone, rent, advance, dues, payments, expenses, agreements, notices, maintenance tickets and notes. Tenants can add their own rent diary and “I paid” messages. Used to run the rent ledger and print receipts.
• Photos and PDFs you upload — to a tenant's document vault, and photos on a to-let listing you publish. Vault files are private to your account. Listing photos are public once you publish the listing.
• Visitor enquiries — a visitor's name, phone and note when someone asks a landlord about a public listing.
• A push notification token — stored when you sign in to the Android app, so the app can receive notifications. We send rent reminders only if you turn them on in Settings; deleting your account deletes the token.
• Security and analytics data — a log of actions in your account with time, IP address and browser or device string; and Google Analytics page views and actions, with ids removed from addresses. Google Analytics also sees your approximate location from your IP address.

We do not collect precise location, device contacts, SMS, advertising ID, or card or bank details. There are no ads in Barir Hisab, and we do not sell your data. The tenant information form at /bharatia-nibondhon-form runs in your browser and nothing typed there is sent to us.

Who processes it for us

Google (Firebase Authentication, Firebase Cloud Messaging, Cloud Storage for listing photos, Google Analytics), Cloudflare (network protection), the hosting provider of the server that runs our database, and an SMS gateway (mim SMS) only if a tenant invite or guarantor check is sent by SMS. All of them process data for us under their own privacy terms.

Where it is stored

In our own PostgreSQL database on a server we control; vault files on that server's disk; listing photos in Google Cloud Storage.

Keeping and deleting

You can delete your account in the app (আরও › সেটিংস › অ্যাকাউন্ট মুছে ফেলুন) or at barirhisab.teamzlab.com/delete-account, or ask on WhatsApp +44 7490 356046 or at [email protected]. Your sessions end at once. After 7 days your data is erased for good. If you deleted by mistake, tell us on WhatsApp within those 7 days and we can restore it. If you were a tenant, your name stays in the landlord's ledger as “মুছে ফেলা ব্যবহারকারী” with phone and email removed, because the ledger is the landlord's own money record. Daily backups are removed after 14 days, so everything is gone within 21 days at most.

Children

Barir Hisab is for adults (18+).

Teamz Lab — [email protected]

For anything about a specific app, please include its name so we can find the right records.

If we add a service that collects something new, we update the list in section 2 and the date at the top of this page. Material changes are also noted in the app's release notes.