How the apps work
Every app follows the same three stages. Measure where the player is, train them at that level, then measure again a few weeks later.
Calibrate
A sport-specific questionnaire places the player on the real scale for their game and records their goals, how many hours they have each week and any injuries to work around.
Train and check in
The app writes a week of training the player can finish. After each session they log what they completed and how hard it felt, and the following week is adjusted from that.
Level up
Every few weeks the app reassesses the player against the rating scale. When they have moved up, they get told, and the next tier of training opens.

Why we build one app per sport
A third shot drop and a bunker shot have nothing in common. Software that covers twenty sports ends up describing all of them as sets and reps. Separate apps let us get the drills, the season structure and the wording right for one game at a time.
It also keeps us honest. Each app has to earn its own subscribers, so a weak product cannot hide inside a bundle.
What each app has to do before launch
Sound like the sport
Drills, scoring and season vocabulary have to read correctly to someone who plays. If a tennis player can tell the copy was written for a generic athlete, it goes back.
Fit the time available
If someone tells us they have three sessions a week, the plan is built for three sessions, not an optimistic seven.
Build load safely
Plans take account of injuries a player reports, increase workload gradually, and are never presented as medical advice.
Show movement
Improvement has to show up on the sport's own scale. If players are not moving, we look at the product first.