Privacy policy
Last updated 21 October 2026
Chargebook is a logbook for your EV charging. It only stores what you type into it, never sells your data, shows no ads and does not track you.
This policy explains what data the Chargebook app and the website https://chargebook.in handle, why, and the choices you have. Chargebook is provided by Kashish Jain, an individual developer based in India ("we", "us"). We act as the data fiduciary for your personal data under India's Digital Personal Data Protection Act, 2023.
The short version
- You can use Chargebook without an account. Your data then stays only on your phone.
- If you sign in, we store your email address and the data you enter so it is backed up and synced between your phones.
- We do not collect your location, contacts, photos or device identifiers.
- We do not use analytics, advertising or tracking tools, and we do not sell or share your data for marketing.
- You can export your data to CSV and delete your account, with all its data, from inside the app at any time.
Data we collect
| Data | Examples | When |
|---|---|---|
| Email address | The address you sign in with | Only if you sign in |
| App settings | Currency, distance unit, time zone, home electricity rate, charging efficiency, petrol price and mileage for the savings comparison | When you set them |
| Vehicles | Nickname, make and model, battery capacity, starting odometer reading | When you add a vehicle |
| Charging sessions | Date and time, Home or Outside, battery % before and after, odometer, energy (kWh), meter readings, price, fees, taxes, total cost, and the station name, operator and city you type in, plus any notes | When you log a charge |
| Vehicle models you add | Make, model and battery capacity of a car missing from our list | When you add a missing model |
Station, operator and city are free text that you choose to enter. The app does not read your GPS location. Please avoid putting sensitive personal information in notes.
How we use it
- To run the app: calculate costs, range, cost per km, charging habits and savings, and show your history.
- If you sign in: to send you a one-time sign-in code by email, back up your data and keep it in sync across your phones.
- To answer you when you contact support.
We use your data only for these purposes, based on your consent when you choose to sign in and use the app. We do not use it to profile you or for advertising.
Where your data is stored
On your phone. Everything you log is kept in a local database on your device, whether or not you sign in.
In the cloud, if you sign in. Your account and data are stored with Supabase, our database and sign-in provider, which also sends the sign-in code emails. Data is encrypted in transit (HTTPS) and protected by access rules so that each account can only read its own records. Supabase's servers may be located outside India; we only transfer data to countries not restricted by the Government of India.
This website is hosted on Vercel. It sets no cookies and uses no analytics. Like any web host, Vercel may keep short-lived server logs such as IP addresses to run and protect the service.
Sharing
We do not sell, rent or share your personal data with third parties, except with the service providers above who process it on our behalf, or where the law requires us to.
How long we keep it
- Data on your phone stays until you delete it, sign out, delete your account or uninstall the app.
- Cloud data stays while your account exists. When you delete your account, your account and all its data are removed from our live database immediately.
- Copies may remain in our provider's routine backups for up to 30 days before they are overwritten.
- Vehicle models you add to the shared list may be kept, but are no longer linked to you.
Your rights and choices
Under Indian law you have the right to:
- Access a summary of your data. You can see all of it in the app, and export it from Settings as a CSV file.
- Correct your data. You can edit any vehicle or charge in the app.
- Erase your data. Delete your account in the app, or follow the steps on our account deletion page.
- Withdraw consent at any time by deleting your account. This does not affect processing already done.
- Nominate someone to exercise these rights for you in case of death or incapacity.
- Raise a grievance with us, and if you are not satisfied, with the Data Protection Board of India.
To exercise any right, write to support@chargebook.in from the email address on your account. We aim to respond within 30 days.
Children
Chargebook is meant for adults who own or drive an EV. It is not directed at anyone under 18, and we do not knowingly collect data from children. If you believe a child has created an account, contact us and we will delete it.
Security
We use encrypted connections, per-account access rules on our database and passwordless email sign-in. No system is perfectly secure; if a breach affecting your data occurs, we will notify you and the authorities as required by law.
Changes to this policy
If we change this policy, we will update the date at the top of this page, and tell you in the app if the change is significant.
Contact and grievance officer
Kashish Jain
Email: support@chargebook.in