Contact and support
Write to productivica.help@gmail.com. Every message is read by the developer who wrote the app. Expect a reply within a few working days. There is no phone line and no chat widget, because there is nobody else to staff them.
Something is broken
Tell me what you did, what happened, and what you expected instead. Your device model and the app version from the bottom of Settings make it much faster to find. Screenshots help.
Privacy requests
To ask what analytics data is held about your device, or to have it deleted, include the device ID from Settings, under View Device ID. Your tasks are not included, because they never leave your device. Details are in the Privacy Policy.
Refunds and billing
Apple handles the payment, so Apple processes the refund: reportaproblem.apple.com. If you are a consumer in the EU you also have statutory rights that Apple's own policy does not replace, and those are set out in the Terms of Service. Write to me either way and I will help.
Feedback and ideas
Especially welcome: anything the app tells you that you think it cannot actually know. That is the one bug report that matters most here, and it has led to real removals before.
Who you are writing to
Eryk WłoszczyńskiUl. Murna 12
63-720 Koźmin Wielkopolski
Poland
productivica.help@gmail.com