If you are serious about training, Training Peaks is probably a great alternative. Strava is the Facebook of activity apps so not really great if you're committed. There is a free plan for TP, but I'm not sure what the limitations are... I pay for it and can track the history of the key metric that matter to me such Power, Heart Rate, Training Zones, Freshness, Power bands etc. There are a LOT of analytical graphs to provide insights into your progress. The key is the more data you collect, the more value there is. i.e. Sleep tracking, weight, HRV, cadence etc.