Most training software is good at remembering numbers. Sets, reps, load, body weight, and exercise history all fit naturally into a database. The harder question is what the software should do with that history.
The decision matters more than the dashboard
If an app recommends adding weight, reducing volume, or changing an exercise, the athlete should be able to see why. A recommendation that cannot be explained is difficult to trust and almost impossible to improve.
Monsters Welcome starts from the idea that training logic belongs inside the product as a visible, testable system. A progression decision should follow a defined strategy, use known inputs, and preserve the version of the rules that produced it.
Version the reasoning
Training strategies change as we learn. If the application stores only the final recommendation, a later rule change can make old decisions impossible to reconstruct. Versioned strategy logic keeps history honest: the application can show what it knew and which rules it applied at the time.
Design for the actual place it is used
Training happens in gyms, garages, and spaces where connectivity is inconsistent. An offline-capable architecture using IndexedDB lets the session continue without turning network quality into a training variable. PostgreSQL supports the larger structured history when the client reconnects.
Keep complexity behind a clear interface
Explainable does not mean overwhelming. The interface can show the decision, the few inputs that mattered, and a short explanation while preserving deeper detail for review. The system should make the next action obvious and the reasoning available.
What I’m building toward
The goal is a useful loop: log the work, interpret performance through an explicit strategy, recommend the next step, and preserve enough context to learn from the outcome. That is a harder product than a digital notebook, but it is also a more useful one.
Monsters Welcome remains in active development. I’ll continue documenting the architecture and the training ideas that shape it on the project page and in this journal.