If your main goal is structured strength training with progressive overload, the “best” app depends on whether you want:

• a built-in program to follow
• a flexible training log with progression tools
• AI-generated adjustments
• serious periodization/block planning

Here are the strongest options by use case:

Best overall for most lifters

Boostcamp

• Great library of proven strength programs
• Easy to follow progression
• Good for beginner to advanced lifters
• Solid for tracking lifts and weekly structure

Best for: people who want to run established programs like 5/3/1, SBS-style plans, hypertrophy/strength hybrids, etc.

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Best for pure training log + progressive overload

Strong

• Very clean interface
• Excellent for logging sets, reps, weights
• Easy to track PRs and overload over time
• Less “programming intelligence” than some competitors

Best for: lifters who already know their program and just need a reliable tracking app.

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Best for adaptive programming / AI-guided progression

Hevy

• Great interface and workout logging
• Strong social/community features
• Good progression tracking
• Nice for custom routines and long-term lifting data

Best for: people who want a polished app with good logging and custom program support.

Fitbod

• Automatically generates workouts
• Adapts based on equipment, recovery, and prior training
• Good if you want guidance without building a plan yourself

Best for: beginners/intermediates who want the app to choose exercises and progression for them.

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Best for serious programming and flexibility

TrainHeroic

• Excellent for coaches and athletes
• Strong program delivery and tracking
• Good for structured strength work, teams, and custom coaching

Best for: people following a coach or running more formalized training blocks.

TrueCoach

• Similar coach/client workflow
• Great if you want personalized programming from a coach
• More about coaching than self-guided lifting

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Best for powerlifting-specific progressions

JuggernautAI

• Designed around strength progression
• Uses adaptive programming
• Especially good if your focus is S/B/D strength

Best for: powerlifters who want an app that auto-adjusts training.

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Best free / low-cost option

Jefit

• Longtime workout tracker
• Lots of exercise database and logging features
• Can work well if you want a budget option

Best for: users who want basic structured logging without paying much.

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Quick recommendations

• Want proven strength programs? → Boostcamp
• Want simple logging and progressive overload tracking? → Strong or Hevy
• Want AI-generated workouts? → Fitbod or JuggernautAI
• Want coach-style programming delivery? → TrainHeroic
• Want budget/basic tracking? → Jefit

What to look for in a good strength app

For progressive overload, make sure the app supports:

• exercise history
• RPE or rep targets
• set-by-set load tracking
• rest timers
• progression rules like adding reps, weight, or sets
• plateaus/deloads
• custom templates and block planning

If you want, I can also give you:

1. a ranked list by beginner/intermediate/advanced, or
2. a comparison table with price, platform, and features.