Short answer
Choose a strength-training tracker that records exercises, sets, repetitions and weight; shows your last performance; and helps you plan progression, but remember that no app alone guarantees muscle gain.
Four things that matter for building muscle
1. Track progressive training
Record weights and reps to compare sessions; aim to increase the challenge gradually when technique and recovery allow, not necessarily every workout.
2. Track how much you train
Weekly resistance-training volume is relevant to muscle growth; a 2026 systematic review found greater volume was generally linked with more hypertrophy, with diminishing returns.
3. Eat enough protein
A large meta-analysis found that protein supplementation can support resistance-training gains and that extra benefit appeared to level off around 1.6 grams of total protein per kilogram of body weight per day on average, with individual variation.
4. Recover and repeat
Build a program you can sustain, leave room for recovery and evaluate changes over several sessions rather than one unusually good or bad workout.
What does research say?
The American College of Sports Medicine's 2026 update explains that many forms of resistance training help, while training volume and load should fit the person's goal.
A 2026 dose-response meta-analysis found training volume was positively associated with muscle growth but showed diminishing returns, so there is no single number of sets that works best for everyone.
A 2018 meta-analysis of protein and resistance training supports paying attention to total daily protein, alongside training; this is research about people, not a clinical trial proving that LIFT produces better outcomes than competing apps.
How LIFT helps with a muscle-building plan
- Start with a repeatable plan: organize exercises into your training split.
- Log the session: record working sets, weight and repetitions.
- Use previous performance: compare your last session and attempt the next target when appropriate.
- Read the progress trend: use strength records and charts to see changes over time.
What LIFT does not do: It does not currently log your calories or sleep automatically, and its progress prompts are not a substitute for appropriate training, nutrition or qualified personal advice.
Want a step-by-step muscle-building plan?
Start with how to build muscle using a repeatable lifting plan, then read how many sets to train each muscle per week to understand the research without chasing a universal number.
Related strength-training questions
Learn how to choose a progressive overload app, use the muscle-building plateau checklist, or read cómo ganar masa muscular en español.
What if you are not gaining muscle?
Before changing apps, look at your training consistency, performance trends, food intake, adequate recovery and whether your plan is suitable for your ability; the cause is not always a lack of workout-tracking features.