Summa Calculator
More than a calculator — everyday tools, smart memory & Premium AI voice.
Everything in one place
A fast calculator plus the everyday tools you actually open — tips, budgets, currency, units, fuel, energy, and travel.
Plans & pricing
Start with every tool you need — free. Upgrade when you want the full experience: speak naturally, remember everything, and leave ads behind.
Free
$0
Always free
- All calculators available
- Live currency exchange rates
- Smart memory
- Custom setups
- Effortless organization
- Contains ads
Summa Premium
The full experience — voice, memory, and zero limits.
$3.99/mo
or $39.99/yr · save 16% · 3-day free trial
- Completely ad-free
- Speak naturally — AI voice on every tool
- Unlimited memory — search, save & share
- Unlimited custom setups & travel plans
- Pin your favourite tools
- Find any past result in one search
Prices shown are in USD and may vary by country. Google Play shows the final localized price at checkout. Cancel anytime in Play Store → Payments & subscriptions. Restore purchases on a new device with the same Google account. See Premium Subscription Terms for full billing details.
Frequently asked questions
Quick answers to the questions we hear most. For step-by-step guides, see the full Help page.
Is Summa free to use?
Yes. The free version includes all everyday tools with ads and fair limits on history and saved setups. Premium removes ads and unlocks AI voice, unlimited history, search, export, favourites, and more.
How does Premium AI voice work?
Voice and AI interpretation are Premium features. Tap and hold the mic, speak naturally (for example, “25 plus 13” or “18 percent of 450”), then release. Microphone access is requested only when you first use voice. Summa does not listen in the background.
What’s included in the 3-day free trial?
All Premium features, including ad-free use, unlimited history, and AI voice. Cancel at least 24 hours before the trial ends in Google Play if you don’t want to be charged. One trial per Google account, as determined by Google Play.
Where is my calculation history stored?
On your device. You can review past results from the History screen in each tool. Premium unlocks unlimited history, search, export, and sharing.
How do I restore Premium on a new device?
Open Settings → Restore purchases while signed in to Google Play with the same account you used to subscribe. Your subscription status syncs automatically.
Does Summa need internet?
Most tools work offline. Currency conversion, live rate updates, and AI voice require an internet connection.
How do I cancel Premium?
Manage subscriptions in Google Play: Profile → Payments & subscriptions → Subscriptions → Summa Premium. You keep access until the current billing period ends.
Why don’t currency rates match my bank?
We show real-time reference rates. Banks, card networks, and transfer services often apply their own rates, fees, and margins, so your actual transaction may differ.
App support
Need help with Summa Calculator? Email us and we’ll get back to you. For how the app works, see the Help guide. For data handling, see Privacy.
Legal
Policies for Play Store and in-app use.