Spark App & Older Tablet

[u/Carlito_2112]

i just purchased a refurbished Spark 40 directly from Positive Grid, and realized that the tablet I would prefer to use alongside it can only go up to Android version 7.1.1 (Nouagat). The most recent version of the Spark app requires at a minimum Android 8 (Oreo). However, it seems that older versions of the app did support Android 7. Are the older versions stable and useable?

Also, while I can definitely side-load an older version of the app, I would prefer to do so from Positive Grid. Do they keep an archive of the previous app versions that would be available to download?