Hi Adam,
Many thanks for the details. We think that the versions you are trying to use are too old to get the proper info from the playstore about the payment and disable the limits. And we can't really change the old versions,- we had to upgrade the code to latest SDKs due to Google policies. So, let's have a look what we can do to support your phones.
The current version 1.57 should work on Android 10, have you tried it? It should also properly disable all the limits. The play store version is not able to send SMSes on its own because of the SDK permissions. To send SMSes automatically you will need to install the free SMS plug-in from
It was designed to work with the latest version of the Email to SMS app on playstore, which is 1.57. It should work on your Android 10 phone.
We used to have a separate version that worked without the SMS plugin and had to be side-loaded, but not for the latest 1.57 version. For that version the SMS plugin is preferred. We can, however, create a version with the SMS-plugin included if you prefer that approach.
As for the Android 5 phone, we can try to lower the requirements and produce a version that should work on 5 but we have limited options when it comes to testing it. Would you be able to check if it works for you if we created a working 1.57 version for Android 5?
Thank you for your interest in the app.
Best regards,
Grzegorz Junka