A perpetual fallback license is a license that allows you to use a specific version of software forever, even if you don't renew the license yearly to get access to the latest version.
When purchasing Tinkerwell, you immediately get a perpetual fallback license for the exact version available at the time. You can use this version as long as your operating system supports the app.
Every Tinkerwell license includes access to updates for one year. After that, you can decide to go back to your perpetual fallback license or renew your license to get access to the latest version. On renewal, we bump your perpetual license to the version that is available at the time of renewal.
We don't sell Tinkerwell as a subscription because we want to make it optional for you to decide if you want to renew your license or not. We don't want to force you to pay for a subscription every year.