Forex Lot Size Calculator privacy policy
Last updated 14 November 2026. This policy covers the Android app Forex Lot Size Calculator (package io.lotsizecalculator), published by Section Nine.
The short version
No account, no name, no email. Your balance and the numbers you enter stay on your phone. The app sends anonymous usage events tied to a random install ID. We don't sell your data.
What we collect
| Data | Why | Kept |
|---|---|---|
| A random install ID made by the app on your phone. It isn't your advertising ID or any hardware identifier, and it isn't linked to your name. | To count installs and group usage events | Up to 24 months |
| App activity: app opened, which calculator you used (with settings such as instrument, account type and currency, never your balance or amounts), pasted-signal success, and taps on Telegram, share and review buttons, with the app version | To see which features are used and improve the app | Up to 24 months |
| Crash and error reports: the error message and stack trace, the screen, app version, phone make and model and Android version | To find and fix bugs | Up to 24 months |
| A push token, only if you allow notifications | To send the notifications you allowed | Until it stops working or you ask us to delete it |
What we don't collect
We don't collect your name, email address, phone number, contacts, photos, precise location, payment details or advertising ID. Your balance and trade amounts never leave your phone.
Who processes data for us
Vercel (hosting for our servers) and Neon (database), Expo (app updates and delivery of push notifications) and Google Firebase Cloud Messaging (push delivery). Exchange rates are loaded by the app from ExchangeRate-API (open.er-api.com), which sees your IP address like any website. Some of these providers process data outside the UK under the safeguards they publish. We don't sell personal data or use it for advertising, and there are no third-party ad networks in our apps.
Telegram
The app links to our free Telegram channels using separate invite links per button. If you join through one, Telegram shows us, as the channel's administrator, that your Telegram account joined through that link. We use this to count joins. It is not connected to your install ID or anything else in the app. Telegram's own privacy policy applies inside Telegram.
Your choices and deleting your data
Uninstalling the app stops all collection. This version doesn't show its install ID, so to delete what we hold, email support@s9.software with your phone model and roughly when you installed and last used the app, and we'll find and delete the matching records within 30 days. If a later version shows the ID in Settings, include it.
Your rights
You can ask to access, correct or delete your data, or object to its use, by emailing support@s9.software. You can also complain to the Information Commissioner's Office at ico.org.uk.
Children
This app is for adults (18+).
Changes
If what the app collects changes, we'll update this page and the date at the top.
Contact
Section Nine · support@s9.software