In short
- You can use the app without an account. Sign-in with Google is optional.
- Your location is sent to us only while you are sharing a live train position and the app is open.
- Other riders see the train's position, never your name or account.
- We do not sell your data, and we do not read your SMS, contacts or files.
- You can delete your account and data at any time.
1Who we are
Train Tracker BD is a free, ad-supported Android app published by Red Green Apps (Red Green Technology), Dhaka, Bangladesh. In this policy, "we" and "us" mean Red Green Apps.
Train Tracker BD is an independent app. It is not affiliated with Bangladesh Railway, the Ministry of Railways or any government entity.
2Information we collect
Schedules, fares, the station map and your favorite trains are stored on your device. Beyond that, we collect data only when you use the features below.
| Data | When it is collected | Why |
|---|---|---|
| Name, email address, profile picture and Google account ID | Only if you choose to sign in with Google | To identify your account and sync your preferences |
| Precise location, train number and time | Only while live location sharing is on and the app is open | To show that train's live position to other riders |
| Correction reports and position confirmations | When you report a schedule error or confirm a train's position | To fix schedules and improve position accuracy |
| Advertising ID, device and app identifiers | While you use the app | To show ads and measure their performance |
| App interactions (screens viewed, features used) | While you use the app | To understand which features are useful |
| Crash logs and diagnostics (device model, Android version, app version) | When the app crashes or has an error | To find and fix bugs |
Location
Location is collected only in the foreground: while the app is open on your screen and you have turned on live location sharing for a train. We do not collect location in the background. Sharing stops when you turn it off or close the app. You can also deny or revoke location permission in Android settings and keep using every other feature.
Account
When you sign in with Google, Google shares your basic profile with us. We never receive your Google password.
3How we use it
- To show live train positions, delays and the freshness of each update.
- To keep schedules and fares accurate using rider reports.
- To keep your account and preferences working across devices.
- To show ads that keep the app free.
- To fix crashes and improve the app.
We do not sell your personal data, and we do not use your location for advertising.
4What other users see
When you share your location, other users see the train's position, how recently it was updated and that it came from a rider. They do not see your name, email, photo or account.
5Third-party services
The app uses these services, which process data under their own privacy policies:
- Google Play Services
- Google AdMob for ads
- Google Analytics for Firebase for usage statistics
- Firebase Authentication for Google Sign-In
- Cloud Firestore for storing live position reports, corrections and account data
- Firebase Crashlytics for crash reports
You can reset your advertising ID or opt out of personalized ads in your Android settings under Google → Ads.
6SMS tracking
The TTMS tracking button opens your phone's own SMS app with a pre-filled message for Bangladesh Railway's TTMS service. You choose whether to send it, and your mobile operator charges the standard SMS rate. The app does not read, collect or monitor your SMS messages.
7App permissions
- Location (optional): used only for live location sharing while the app is open.
- Notifications (optional): used for departure reminders you set.
- Internet: used for live positions, sign-in, ads and analytics.
The app does not request SMS, contacts, camera, microphone or storage permissions.
8How long we keep data
- Raw location reports: deleted within 24 hours. We may keep anonymous train delay statistics that cannot identify you.
- Correction reports: kept until reviewed, for up to 12 months.
- Account data: kept until you delete your account.
- Analytics, ad and crash data: kept according to Google's and Firebase's retention settings.
9Deleting your data
You can delete your account and the data linked to it at any time:
- In the app: Settings → Account → Delete account.
- On the web: rgtech.xyz/delete-ttbd.html
- By email: armansarkerrony@gmail.com, sent from the email address on your account.
We delete your account data within 30 days of your request. If you never signed in, you can remove the data stored on your device by clearing the app's storage or uninstalling it.
10Security
Data is encrypted in transit, and access to our database is restricted. No method of transmission or storage is completely secure, so we cannot guarantee absolute security.
11Children
The app is not directed at children under 13, and we do not knowingly collect personal information from them. If we learn that a child under 13 has provided personal information, we delete it promptly. Parents can contact us to request deletion.
12Changes and contact
We may update this policy when the app changes. The effective date at the top always shows the latest version, and important changes will be noted in the app's release notes.
Questions about privacy? Email armansarkerrony@gmail.com or visit rgtech.xyz.
বাংলায় সারসংক্ষেপ
- অ্যাকাউন্ট ছাড়াই অ্যাপ ব্যবহার করা যায়। Google দিয়ে সাইন-ইন ঐচ্ছিক; সাইন-ইন করলে আপনার নাম, ইমেইল, প্রোফাইল ছবি ও Google অ্যাকাউন্ট আইডি আমরা পাই।
- আপনি লাইভ লোকেশন শেয়ার চালু করলে এবং অ্যাপ খোলা থাকলেই শুধু আপনার অবস্থান আমাদের সার্ভারে যায়। ব্যাকগ্রাউন্ডে লোকেশন নেওয়া হয় না।
- অন্য যাত্রীরা শুধু ট্রেনের অবস্থান দেখেন — আপনার নাম বা অ্যাকাউন্ট নয়।
- বিজ্ঞাপন (AdMob), ব্যবহার পরিসংখ্যান (Firebase Analytics) ও ক্র্যাশ রিপোর্টের (Crashlytics) জন্য ডিভাইস আইডি ও ব্যবহারের তথ্য সংগ্রহ হয়।
- অ্যাপ আপনার SMS পড়ে না; TTMS বাটন শুধু আপনার মেসেজ অ্যাপ খুলে দেয়।
- লোকেশন রিপোর্ট ২৪ ঘণ্টার মধ্যে মুছে ফেলা হয়। আমরা আপনার তথ্য বিক্রি করি না।
- অ্যাকাউন্ট ও তথ্য মুছতে: অ্যাপে Settings → Account → Delete account, অথবা rgtech.xyz/delete-ttbd.html, অথবা ইমেইল করুন armansarkerrony@gmail.com। ৩০ দিনের মধ্যে মুছে ফেলা হবে।
ইংরেজি সংস্করণটিই মূল নীতি হিসেবে গণ্য হবে।