App: Summa Calculator · Developer: Smart Tools Developer
Last updated: 24 September 2026
This Privacy Policy explains how the Summa Calculator app ("the app", "we", "us") handles information when you use it. We built the app to do calculations and everyday finance tasks on your device. We collect as little as possible, and we do not require you to create an account or sign in.
Voice input is a Premium feature. Free users can use all calculator and tool screens by typing; the mic button is not shown until you have an active Premium subscription (or eligible trial).
When a Premium user presses and holds the microphone button, the app uses the microphone only for that moment to convert speech into text (for example, a number to calculate). Speech recognition is performed by your device's speech service (typically provided by Google or your device manufacturer). The app does not store your voice recordings on your device beyond that session. Audio capture stops as soon as you release the button.
With Premium, optional AI voice interpretation may send the text transcript (not raw audio) to our secure cloud service to understand natural-language requests. That processing is tied to your subscription and subject to fair-use limits on Standard plans. We do not sell transcript content to third parties.
The app displays ads using Google AdMob. To serve ads, Google may collect and process certain data, such as your device's advertising identifier and information about your device and ad interactions. This is handled by Google in accordance with its policies. See How Google uses information from sites or apps that use our services.
We use Google Firebase Analytics to understand general, aggregated app usage (for example, which features are opened) so we can improve the app. We also use Firebase App Check with Play Integrity to help protect the app and its backend calls from abuse. These services may process device identifiers and similar technical data.
Some tools, such as the currency converter, fetch exchange-rate data over the internet from a third-party rate provider. These requests send standard technical information (such as your IP address, as part of any normal internet request) but do not include your personal calculations.
Fuel Trip can look up a driving distance when you type From and To. Those place names (not GPS, and not your current location) are sent to OpenStreetMap services (Photon and OSRM) to suggest places and measure the road. You can always type the distance yourself instead. We do not store those lookups on our servers.
Your calculation history, tip/budget entries, currency selections, and app preferences are stored locally on your device. They are not uploaded to us. You can remove this data at any time by clearing history within the app or by uninstalling the app.
With your permission, the app may show local reminders (for example, budget or daily snapshot reminders). These are generated on your device.
When you tap Scan on the calculator, the app can use the camera (or a photo you choose with the system photo picker) to read a printed amount, such as a price or total. Text recognition runs on your device. We do not upload the photo, and we do not get broad access to your gallery. Camera permission is requested only when you use Scan. You can still pick a photo if you decline camera access.
| Permission | Why it is used |
|---|---|
Microphone (RECORD_AUDIO) | Premium voice input while you hold the mic button (requested only when you use the mic). |
Camera (CAMERA) | Scan amount: read a printed price or total on your device (requested only when you tap Scan). Optional; the app can still be used without a camera. |
| Internet / Network state | Load ads, fetch currency exchange rates, and optional Fuel Trip place/road lookup; detect connectivity. |
Notifications (POST_NOTIFICATIONS) | Show optional reminders you enable. |
Display over other apps (SYSTEM_ALERT_WINDOW) | Optional floating quick-calculator bubble. |
| Foreground service | Keep the optional floating calculator running while in use. |
Run at startup (RECEIVE_BOOT_COMPLETED) | Restore reminders you set after the device restarts. |
| Vibrate | Haptic feedback on key and mic presses. |
We do not sell your personal data. Limited technical data is processed by the third-party service providers described above (Google AdMob, Google Firebase) so they can provide their services to us. Optional Fuel Trip place names are sent to OpenStreetMap services (Photon and OSRM) only to look up a road distance. Their handling of data is governed by their own privacy policies:
Data stored on your device remains until you clear it in the app or uninstall the app. Aggregated analytics and ad-related data are retained by the relevant Google service according to its policies. To request help regarding your data, contact us using the details below.
The app is intended for a general audience and is not directed to children under the age required by your local law for data processing. We do not knowingly collect personal information from children.
Depending on where you live (for example, under GDPR in the EU/EEA or the CCPA in California), you may have rights to access, correct, or delete certain data, and to object to certain processing. Because the app does not require an account and stores your content locally, you can exercise much of this directly by clearing data in the app. For other requests, contact us below.
We may update this policy as the app evolves (for example, if cloud AI voice features are introduced in a future version). We will update the "Last updated" date above and, where appropriate, notify you in the app.
If you have questions about this Privacy Policy, contact
Smart Tools Developer support:
csmarttools@gmail.com