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Installable
Add it to your home screen like an app — full screen, fast launch, your own icon. No app store required.
Free industry tools
RSI Tools
A free, installable calculator suite for the tinplate and steel trade — used by our customers and suppliers alike. No app store, no account. Works offline on phone, tablet and desktop.
Why install it
Built for the plant floor and the sales desk
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Works offline
Everything is cached on your device, so it keeps working with no signal — on the floor or in the field.
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Seven calculators
The everyday math of tin mill and flat rolled, in one place.
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Free for the trade
No subscriptions, no data collection, no login — built by RSI for customers, partners and industry pros.
What's inside
One suite, seven tools
- Coil Calculator
- Pricing / NPW
- Thickness conversion
- Temper designations
- Tin coating weights
- Decimal equivalents
- Unit converter
Get started in 30 seconds
How it works
No download. No account. Just open and go — then add it to your home screen so it's one tap away.
Open RSI Tools
Visit tools.rsi.biz in your browser — it loads instantly, the full suite right there.
Add to Home Screen
Install it as an app in a couple of taps — pick your device below.
Launch full-screen, anywhere
It opens in its own window, works offline, and keeps your settings — on phone, tablet or desktop.
- Open tools.rsi.biz in Safari.
- Tap the Share button (the square with an upward arrow).
- Scroll down and tap Add to Home Screen, then tap Add.
- RSI Tools now lives on your home screen like a real app.
- Open tools.rsi.biz in Chrome.
- Tap the Install app banner if it appears — or open the ⋮ menu and choose Add to Home screen.
- Tap Install. RSI Tools appears in your app drawer and on your home screen.
- Open tools.rsi.biz in Chrome or Edge.
- Click the Install icon in the address bar — or open the ⋮ menu and choose Install RSI Tools.
- It opens in its own window and lands on your desktop / taskbar.
Ready to crunch some numbers?
Open the full RSI Tools suite in your browser — then add it to your home screen so it's always one tap away.
Open RSI Tools ↗