Maximus 1RM Calculator

Is your 1RM actually going up?

Stop drowning in bloated and over-complicated fitness apps. Maximus is a zero-nonsense and hyper-focused strength tracker built for lifters who care about one thing: getting stronger.

No accounts to create, no ads flashing in your face, and absolutely no internet connection required. Your training data stays exactly where it belongs—on your phone.

WHY CHOOSE MAXIMUS?

100% Offline & Private: Maximus doesn't even request internet permission. It literally cannot track you or sell your data. No logins, no subscriptions, no nonsense.

Built for the Gym, Not the Boardroom: A clean, lightning-fast, dark-themed interface designed to be used with sweaty hands between heavy sets.

Track Real Strength, Not Just Volume: Total volume is a vanity metric. Maximus focuses on your estimated One-Rep Max (1RM), showing you if you are actually building raw power over time.

KEY FEATURES built for serious lifters:

Automatic 1RM Tracking: Every set you log automatically calculates your estimated 1RM using the industry-standard Epley formula. Watch your strength trend upward on clean, interactive progress charts.

Split-Second Logging: Select your lift, punch in weight and reps, and tap save. Maximus displays your last session's stats right on the screen so you always know the exact number you need to beat today.

Smart Plate Calculator: Stop doing mental math when you’re oxygen-deprived. Enter your target weight, and Maximus tells you exactly which plates to load on each side of the bar. Fully customizable for bar weight (45/35 lb or 20/15 kg) and your personal plate inventory.

Built-in 1RM Percentage Calculator: Quickly estimate your max from any rep-max and get an instant percentage breakdown (95% down to 70%) to easily program your next training block.

Full Workout History: View your training journey by day with total volume, top estimated 1RM, and a set-by-set breakdown.

Your Data, Your Control: Want to back up? Export a clean backup file instantly and upload it to Google Drive, local storage, or email, and restore it on any device. Delete everything with a single tap whenever you want a fresh start.

GET STARTED IN SECONDS

Maximus pre-loads the "Big Five" barbell staples to get you moving instantly:

Squat
Bench Press
Deadlift
Overhead Press (OHP)
Barbell Row

+ Add unlimited custom exercises for dumbbells, cables, or bodyweight work.

GLOBAL & FLEXIBLE

Units: Seamlessly toggle between lbs and kg at any time.

Languages: Fully localized in English, Español, Français, Português, 日本語, and 中文.

If you’re still tracking your heavy lifts in a clunky notes app, a messy spreadsheet, or just trying to remember them between sets, it’s time to upgrade.

Download Maximus today, beat your last session, and watch your 1RM climb.