The license is purchased through the application itself.
To make the purchase, you must associate a credit card or a prepaid card to your account: Google Play or Huawei AppGallery for Android and Apple AppStore for iOS.

Some Stores may accept multiple payment methods.

Android applications must be installed directly from an authorized Store (Google Play Store or Huawei AppGallery) otherwise the license cannot be verified. It is not possible to install them manually via apk or restore them with a backup software.

After installation, open the app and go to Settings > License, finally restore the purchased license.

To restore the subscription correctly you must be logged in to the Store with the same account (email address) used for the purchase.

It is not possible to restore a purchase made with another account or using a different Store.

Install the application from the Apple AppStore.

After installation, open the app and go to Settings > License, finally restore the purchased license.

To restore the subscription correctly you must be logged in to the Store with the same account (Apple ID) used for the purchase.

It is not possible to restore a purchase made with another account or using a different Store.

If you have purchased the old PRO version of the app: go to the App Store and click on the user’s logo at the top right. In the tab shown select the item “Purchases” where to search and install the app purchased previously.

Install the application from the Microsoft Store.

After installation, open the app and go to Settings > License, finally restore the purchased license.

To restore the subscription correctly you must be logged in to the Store with the same account (email address) used for the purchase.

It is not possible to restore a purchase made with another account or using a different Store.

Certainly, as long as the account set up on the second device is the same account used for the purchase.
However, it is not possible to purchase an Android license and use it on an iOS or Windows device (and vice versa).
No, you can’t transfer the license.
The app is distributed by three different Stores: PlayStore for Android, Apple AppStore for iOS, Microsoft Store for Windows.
In this case you must purchase a new license.
To cancel the subscription, open the app > Settings > License and select “Manage subscriptions”, at this point you will be redirected to the Store page which will allow you to cancel your subscription.

Alternatively, you can use the respective Stores’ functions directly:
Google Play Store: How to cancel a subscription made through the Google Play Store
Huawei AppGallery: How to cancel a subscription made through the Huawei AppGallery
Apple App Store: How to cancel a subscription made through the App Store
Microsoft Store: How to cancel a subscription made through the Microsoft Store

The apps are available free of charge for Android, iOS, and some for Windows (providing basic calculations and displaying ads), with the option to make in-app purchases to access a PRO version.
The pricing model for the PRO version includes an annual or quarterly subscription that provides access to all advanced calculations and removes ads.
Additionally, each app offers a 7-day free trial to evaluate its capabilities.
The apps only require an internet connection to validate the license; all calculations are performed offline. No user data is collected or shared with third parties, ensuring privacy.
This usually happens when you are signed in to the Store with a different account from the one used for the purchase. The PRO license can only be restored with the correct account.
First, find out which account holds your purchase by checking your order history:

Android (Google Play): open the Play Store → tap your profile icon (top right) → “Payments & subscriptions” → “Budget & history”.

iOS (App Store): open the App Store → tap the sign-in / user icon → “Purchase History” (you may be asked to sign in). For older purchases, tap “Last 90 Days” → Date Range → Custom → select the year.

Windows (Microsoft Store): open https://account.microsoft.com/billing/orders and sign in.

If you have more than one account, you may not see the purchase because you are logged in with a different email: sign in with your other accounts until you find the order for our app.
Once you have identified the account that holds the purchase, sign in to the Store with that account, then open the app and complete the standard unlock procedure: Settings → License → “Restore Pro Key” or “Restore subscription”, depending on the type of purchase you made.

We only develop the apps; sales are handled directly by the Store. To obtain your invoice:

Android (Google Play): https://support.google.com/googlepay/answer/7644144

iOS (Apple App Store): billing and payment information at https://www.apple.com/shop/help/payments, or contact Apple at https://reportaproblem.apple.com/

Windows (Microsoft Store): open https://account.microsoft.com/orders, sign in with the account used for the purchase, select the order → “Order details” → “Print invoice/receipt” (printable or saved as PDF). Alternatively contact Microsoft Support: https://support.microsoft.com/en-us → “Contact us” → “Billing & purchases”.

The license is tied to the account used for the purchase, so a new account does not hold the license data. Since sales are managed directly by the Stores, we are not able to migrate a license from one account to another. Please contact the Store’s customer service directly:

Google Play: https://support.google.com/googleplay/ (then “Contact us”)
Apple App Store: https://support.apple.com/
Microsoft Store: https://support.microsoft.com/en-us/contactus/
Huawei AppGallery: https://consumer.huawei.com/en/support/mobile-services/appgallery/

The free version includes the main calculations and shows advertisements, which help cover the significant development costs. By purchasing the PRO license you unlock the advanced calculations and remove all ads. You can upgrade directly from the app’s side menu → “Upgrade to the PRO version”.
Industry regulations evolve continuously: with the subscription model we can provide continuous updates that keep the app always compliant with the standards. In the same way, new devices and new operating system versions are released all the time, and continuous updates ensure the app stays compatible. For these reasons, the lifetime license is no longer available for purchase.
If you previously purchased a lifetime license (or a Pro Key), you can always restore it and keep using it: it remains valid even though it is no longer sold.
Yes, you can change your plan at any time. In the app go to Settings → License → “Current plan”: there you can see the available options, prices and validity periods, and switch plan. Subscriptions renew automatically but can be cancelled at any time.
No. The license is valid for a single app and does not extend to other Egal Net apps. Each app requires its own separate license.
At the moment there are no discounts available — neither for the license, nor for purchasing multiple apps, nor for transferring a license between different devices (Android/iOS/Windows). We recommend following our website and social pages: we occasionally run promotions or special offers.
The app may not be compatible with Custom ROMs or with devices that have root permissions. On these devices the Google Play Services — which are required to validate the license — are often missing or altered, and this can prevent the app or the PRO license from working correctly. We recommend using the app on a standard, non-rooted configuration with up-to-date Google Play Services.
On Android apps installed from the Play Store, the Google Play Services are essential to validate the license and must always be kept up to date. More info: https://support.google.com/googleplay/answer/9037938
If the app is installed from the Huawei AppGallery, the Huawei Mobile Services (HMS) are used instead of the Google Play Services. The Huawei AppGallery is also a good alternative for installing our Android apps where Google Play is not available (it works on non-Huawei devices too): https://consumer.huawei.com/cn/support/appstore/#