← SciCalc36

Privacy Policy

Last updated: October 1, 2026

SciCalc36 is a scientific calculator. There is no account, and SciCalc36 never asks for your name, email address or contacts. Nothing you type into the calculator leaves your device, unless you put it in a feedback email yourself. The free app shows ads, which are personalized only if you allow it.

SciCalc36 comes as a website (which you can add to your home screen) and as an app for iPhone, iPad and Android. The website shows no ads and sells nothing. The free app shows a small ad banner at the top of the screen, and SciCalc36 Pro, a paid upgrade, removes it. The sections below explain what each part involves.

Your calculations stay on your device

To work like a real calculator, SciCalc36 remembers your calculator memory (history, stored variables, lists, matrices, vectors, f(x) and modes) and your preferences (theme, text size, screen height and haptic feedback). The app also remembers whether you have Pro. All of this is saved only on your own device. Nothing you type into the calculator is ever sent to us, to the ad network or to anyone else.

SciCalc36 also keeps a copy of itself on your device so it works without an internet connection.

You can erase your calculator memory at any time with Settings → Reset all memory. Deleting the app, or clearing your browser's data for the website, removes everything it saved on your device.

Ads in the free app

The free app shows banner ads from Google AdMob, Google's advertising network.

• Personalized ads only if you allow them. Personalized ads are chosen using what an ad network knows about your interests from other apps and websites. That's what "tracking" means.
  • On iPhone and iPad, SciCalc36 asks once, with Apple's "Allow tracking?" prompt. If you allow it, Google can use your device's advertising identifier to personalize and measure ads. If you don't, ads aren't personalized. Change your answer at any time in iOS Settings → Privacy & Security → Tracking.
  • On Android, as in most Android apps, ads can be personalized using your device's advertising ID. You can reset or delete it in your phone's settings (Privacy → Ads).
  • On any device, turning off Settings → Personalized ads in SciCalc36 makes every ad non-personalized.
• Your consent where the law requires it. In the European Economic Area, the UK and Switzerland, the app shows Google's consent message before any ads load, and ads are personalized only with your consent. Where US state privacy laws apply, you can opt out of the "sale" or "sharing" of your information for advertising. Change these choices in Settings → Ad privacy choices (shown where it applies) or by turning off personalized ads.
• What Google receives. To show an ad and count it, Google receives some information from your device: its IP address (used for approximate location), the kind of device and its operating system, the app's name and version, and how you interact with ads (for example, whether an ad was shown or tapped). If you've allowed personalized ads, it also receives your device's advertising identifier. Google uses this information to deliver, personalize and measure ads, limit how often you see the same ad, and prevent fraud and abuse. Read how Google uses information from apps that use its services and Google's Privacy Policy.
• Ads are kept suitable for teens. The app limits ad content to Google's "T" (teen) rating.
• With Pro, no ads are requested at all.

Buying SciCalc36 Pro

Pro is sold through Apple's App Store and Google Play, as a monthly or yearly subscription or a one-time purchase. Apple or Google handles the payment. We never see your card or bank details, your name or your email address.

To check whether you have Pro, the app uses RevenueCat, a service that verifies App Store and Google Play purchases. RevenueCat receives a random ID that the app creates (it isn't linked to your name or email), your SciCalc36 purchase history (which plan, when, the price and currency, and the store's receipt), and basic information about your device, such as its operating system, the app's version and your country or region. It uses this only to confirm and restore your purchases. Read RevenueCat's Privacy Policy.

What we don't do

SciCalc36 has no analytics of its own and no cookies on the website. Apart from the advertising described above, we don't sell or share your personal information, and we don't work with data brokers. SciCalc36 never collects your precise location, photos, contacts or anything you type.

Hosting

The website is served by Netlify. Like any web host, Netlify handles technical information such as your IP address, browser type and the time of each request, so it can deliver the pages and keep the service secure. That information is handled under Netlify's privacy policy. We don't receive it or use it to identify you. The website doesn't contact Google's ad network or RevenueCat.

Children

SciCalc36 is for ages 13 and up: high-school and college students, engineers and anyone else. It isn't directed to children under 13, and we don't knowingly collect personal information from children under 13.

Your choices

• Get SciCalc36 Pro to remove the ads.
• Turn off Settings → Personalized ads for general ads only.
• Change your ad consent or opt out in Settings → Ad privacy choices (where the law provides one).
• On iPhone and iPad, allow or stop tracking in iOS Settings → Privacy & Security → Tracking.
• On Android, reset or delete your device's advertising ID in your phone's settings, under Privacy → Ads.
• Erase your calculator memory with Settings → Reset all memory, or delete the app.
• To ask for your purchase records to be deleted from RevenueCat, contact us. A deleted record can't restore Pro, so you'd need to restore your purchase again.

Feedback

Settings → Send feedback opens your own email app with a message to us, started for you. It includes the app version and the type of device and its system version, and for a problem report, the calculator's modes and your last calculation. Nothing is sent until you send the email yourself, and you can change or delete any of it first. We use what you send only to reply to you and to improve SciCalc36, and we delete it if you ask.

Changes to this policy

If SciCalc36 changes how it handles information, this page will be updated before the change takes effect, and the date at the top will change.

Contact

If you have a question about this policy or a request about your information, email scicalc36@gmail.com or visit the support page.