I purchased this calculator and have enjoyed it for years. It was advertised as one-time purchase. Now with the latest version it is popping up a subscription authorization screen every time I press the equals button asking for a subscription. It has also disabled a lot of the unit conversion functionality. You can’t offer a product as a one time purchase and then years later after the sale come back requiring me to pay you more money. If this is not resolved soon I will delete the app and never purchase anything else from this developer.
This was an error on our part, legacy user were never supposed to be required to subscribe. It should be all fixed now since v3.7.3. You can always reach us via UserVoice in the app or support@qapps.com if you have any issues or suggestions. Thanks!