Workout App

Domain model draft

Plan

• id
• name
• description
• links
• data

SessionSechedule Schedule for one session of a workout plan

• id
• plan
• name
• description
• links
• data

Exercise Specs for a specific Exrecise

• id
• sessionSchedule
• name
• reps
• sets
• rest
• description
• links
• data

PerformedSession Instance of a session performed by a user

• id
• user
• sessionSchedule
• startedAt
• completedAt
• note

PerformedExercise Exercise performed by a user during a performed workout session

• id
• user
• performedSession
• reps
• sets
• rest
• weight
• startedAt
• completedAt
• note

User

• id
• name

Notes about types

Unless otherwise specified

• Strings such as name, note, description are text
• Weights are numeric, always in grams and converted in frontend/for end user
  • Constraint CHECK(VALUE >= 0)
• Sets, reps are positive integers
• id's are UUID unless otherwise necessary, in such cases serial
• links are arrays of text (or possibly IE max, varchar(2082)) text[]

Positive Integer

https://www.postgresql.org/docs/current/sql-createdomain.html

CREATE DOMAIN positive_int AS int
    CHECK(VALUE >= 0)

Tech stack

Backend

• Database
  • Database first approach
  • PostgresSQL
  • Driver
    • asyncpg https://github.com/MagicStack/asyncpg
    • aiopg (backup) https://github.com/aio-libs/aiopg
    • psycopg2 (worst case fallback)
• Application layer
  • Python
  • FastAPI
  • PyDantic
    • Maybe write own object mapper/model generator with aiopg
  • REST w. OpenAPI specs and/or GraphQL w. apollo?
  • Async IO

Frontend

• Native App
  • ReactNative
  • iOS first
  • Focus on experience in the gym, at your workout
  • Healthkit integration
  • Suggestion, create a mobile web-app using React Native for web for platforms we don't officially support with goal to share most code.
    • Also faster & easier to deploy
• Web cloud app
  • Online app, desktop/mobile
  • Focus on
    • Analyzing previous workouts
    • Create new workout schedules
    • See statistics and progress
    • Social? (Not initial version)