Turn scripts into auto-generated UIs, APIs and cron jobs. Compose them as workflows or data pipelines. Build complex, data-intensive apps with ease. Write and deploy software 10x faster, and run it with the highest reliability and observability on the fastest self-hostable job orchestrator
Amazon AWS Device Farm I think that should be an alternative.
But it does not look free.
If I remember correctly there was even something embedded in B4A to test GUI on different display.....