Take the calculator into the field
The same calculator, installed on your phone. It keeps working where there is no signal, which is usually exactly where you need it.
Roleta Calculator
The whole app in one file · 170 KB
Download it once and it is yours. It opens in whatever browser your phone already has, and it keeps working where there is no signal — which is usually exactly where you need it. Nothing to install, no warning screens, no account.
Download the calculatorShare it with another grower: send them this page, or forward the file itself on WhatsApp.
Install it from your browser
No download, no warning screens, works offline
The Android build is still being prepared, but you do not need it. Open the app in your phone's browser and it will offer to install itself — a real icon on your home screen, opening full screen with no browser bar. Once installed it works with no signal, and it updates itself when you next have one.
Open the appOn Android a green Install banner appears at the top of the app. One tap and it is on your home screen.
On iPhone tap the Share button in Safari, scroll down, and tap Add to Home Screen.
Installing it
- Tap DownloadYour phone saves the file to Downloads. It may ask you to confirm.
- Open the fileTap the notification, or find it in your Files app under Downloads.
- Allow this one installAndroid asks whether to allow installs from your browser. Tap Settings, turn it on, then come back.
- Tap Install anywayThe warning about harmful files appears for anything not from the Play Store. Tap the small "Install anyway" or "More details" link.
- Open itRoleta appears with your other apps. No account needed.
Stuck on any step? Message us on WhatsApp and we will talk you through it.
What it does and does not ask for
Permissions
Internet, only to fetch updated prices when you have signal. Nothing else — no location, no camera, no contacts, no files.
Your data
Everything you enter stays on your phone. No account, no tracking, nothing sent anywhere. Read the policy.