Begin with accurate entries, then use the record to answer a specific question.
Record the result
A set at 30 kg for eight repetitions should stay eight even if the plan said ten. Keep the actual weight if it changes between sets.
Keep context with the exercise
A different handle, machine or movement variation can explain a different result. Note the change at the time.
Compare before concluding
Review several comparable entries rather than treating one changed number as a trend. The app records training; it does not establish peak performance or diagnose a plateau.
Start with the individual sets
Consider two sessions of the same exercise: 40 kg for 10, 10 and 8 repetitions, then 42.5 kg for 8, 8 and 8. There is more than one difference: load rose, while total repetitions fell. Neither the heaviest set nor a session total explains the entire change. Read both sets of entries with their notes before deciding what the comparison means. The values illustrate recordkeeping and are not suggested loads.
Avoid making the graph explain everything
A chart summarizes the fields it receives. A new exercise variation, different machine, shortened session or recording mistake can change the picture without being a straightforward improvement or decline. Keep comparable exercise identities and inspect unexpected points. An estimate or total is not a diagnosis of strength, recovery or readiness. Use a qualified training plan for decisions about how to progress; use the log to make the actual results available for that discussion.