What Stronger does

Stronger, operated by Atlas Smart Technologies Ltd. (incorporated in Northern Ireland, United Kingdom; company number 08172165), is a consumer mobile application for gym-based strength training. The iOS and Android app combines workout logging (sets, reps, weight, rest timers) with a proprietary Strength Score system that benchmarks users against population standards across 12 muscle groups, adjusted for bodyweight, gender, and training age. The product surface includes a 400+ exercise library with instructions and form cues, adaptive routines that auto-regulate training, weak-point and volume analytics, group challenges with friend leaderboards, and an Apple Watch companion. AI-generated personalised routines were added in 2026, producing periodised programs with progressive overload from user-specified goals, equipment, and experience level. The app integrates bidirectionally with Apple Health (HealthKit) and Google Fit (Health Connect), reading body metrics, sleep, and HRV while writing workout logs back to consolidated health records; health data is kept on-device and not transmitted to Stronger servers.

The technology stack relies on a cloud-synced mobile platform with health-platform interoperability, an algorithmic scoring layer for Strength Score and weak-point detection, and a rules-plus-AI engine for adaptive and AI-generated routines. Distribution is exclusively digital through Apple App Store and Google Play globally, supplemented by a content/SEO engine comprising 40+ blog articles and 10+ free web calculators (Strength Score, RPE, 1RM, volume, body composition, recomp, barbell weight, percentage chart, with DOTS and warm-up marked coming soon). The company holds no patents and discloses no trademarks in the supplied record.

The business model is pure freemium subscription. The free tier provides core workout logging, rest timers, basic progress charts, exercise library access, custom routine building, and health-platform sync. Premium unlocks Strength Score and global rankings, adaptive and AI-generated routines, the full exercise library, weak-point and volume analytics, group challenges, deload suggestions, and data exports, priced at $9.99/month or $39.99/year with a 7-day free trial. There is no in-app economy, cosmetics, or secondary purchases. Subscription infrastructure is handled by RevenueCat for in-app purchases and Paddle as Merchant of Record for website-originated transactions, with Customer.io (EU-stored) used for email. Customer acquisition is product-led and community-led, driven by App Store featuring, organic search, the free calculator ecosystem, and in-app social/competitive features; no enterprise, channel, or paid-performance motion is disclosed. The company is privately held, employs 1-10 people, and has no disclosed funding rounds, parent company, or acquisition history.

Name

Stronger

Legal name

Atlas Smart Technologies Ltd.

Website

https://strongermobileapp.com

Company type

Private

Founded year

2021

Operating status

Operating

Headcount range

1–10 employees

Short description

Stronger is a consumer mobile app (iOS and Android) that turns strength training logs into a proprietary bodyweight-adjusted Strength Score across 12 muscle groups, serving 2M+ individual lifters globally through a freemium subscription with AI-generated personalised routines.

Ownership category

akta.pro rank

Product category

Fitness Tracking Software

NAICS

Fitness and Recreational Sports Centers (713940)

akta.pro primary industry

Strength & Conditioning / Athletic Performance Training (HSADAEAB)

akta.pro secondary industry

Strength & Conditioning Personal Training (HSADAAAB)

Keywords

• Workout tracking app
• Strength training app
• Fitness tracking software
• Gym workout planner
• Exercise logging app

Headquarters

HQ city

Ballymena

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Software

Cost components

Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Premium Subscription (Freemium): Free-to-download app with core workout tracking functionality. Premium subscription unlocks Strength Score, adaptive routines, full exercise library, AI programming, and advanced analytics. Offered as monthly ($9.99) or annual ($39.99) plans. 7-day free trial for new premium users. No in-app economy, cosmetics, or secondary purchases—pure subscription model.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

Stronger is a freemium mobile gym workout tracker and strength training app for iOS and Android that combines workout logging (sets, reps, weight) with a proprietary Strength Score benchmarking system—adjusted for bodyweight, gender, and training age—to produce a single composite metric across 12 muscle groups. The premium tier ($9.99/month or $39.99/year) unlocks AI-generated adaptive routines, weak-point muscle analysis, group challenges, and the full 400+ exercise library. The company also operates a suite of free web-based lifting calculators (1RM, RPE, volume, body composition, Strength Score) to drive organic SEO acquisition.

Product overview

Stronger is a gym workout tracker and strength training mobile app for iOS and Android, operated by Atlas Smart Technologies Ltd. The core product is the Stronger App, which combines workout logging, the Strength Score benchmarking system, AI-generated personalized training programs, and group challenges with friends. The product portfolio includes a suite of free web-based lifting tools (Strength Score Calculator, RPE Calculator, 1RM Calculator, Barbell Weight Calculator, Training Volume Calculator, Lean Body Mass Calculator, Body Fat Calculator, Body Recomp Calculator, Weight Lifting Percentage Chart, and upcoming Warm-up and DOTS Calculators), plus a 400+ exercise library. The premium subscription unlocks the full Strength Score system, adaptive routines, and AI program generation.

Differentiator

Problem solved

Functional benefit

Products and services

• Stronger App

Quantifiable outcome

• 2M+ users have downloaded the app, indicating strong market adoption and retention
• +2 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

AI capability3 records

Feature7 records

Partnerships

Four partnerships are on record, tiered core.

• Apple Health (HealthKit)coreTechnology or IntegrationBi-directional integration with Apple Health. Stronger reads body metrics, sleep, heart rate, HRV, and active energy from HealthKit with explicit user consent. Stronger writes workout log data (exercise type, sets, reps, weight, duration) back to Apple Health. Health data stays on device only—never transmitted to Stronger's servers.
• Google Fit (Health Connect)coreTechnology or IntegrationBi-directional integration with Google Fit/Health Connect. Stronger reads body metrics, activity, sleep, and vitals from the platform with explicit user consent. Stronger writes workout logs to Google Fit for consolidated health records. Health data stored on device only—never sent to Stronger's servers.
• PaddlecoreTechnology or IntegrationPaddle.com Market Limited acts as the Merchant of Record for online purchases (website subscriptions and one-time payments). Paddle handles transaction processing, billing, and applicable taxes. Refunds for online purchases are issued through Paddle to the original payment method. Registered in England and Wales (company number 08172165).
• RevenueCatcoreTechnology or IntegrationSubscription management provider used by Stronger to manage in-app purchases through Apple App Store and Google Play. Shares limited account and purchase information with Apple when users request refunds or dispute charges through the App Store, to help Apple assess the request and prevent fraudulent refund activity.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Caliber: Strength training app with personal coaching and AI-driven progression. Stronger compares against Caliber and they overlap on adaptive programming and structured strength guidance.
• Liftoff (Strength Training): Gamified strength training app with guided programs and workout tracking. Mentioned by Stronger in pricing comparisons and competes for casual lifters drawn to game-like engagement.
• Boostcamp: Workout tracker focused on strength training programs with a social/community layer and coach-led content. Stronger compares against Boostcamp directly; both blend program delivery with logging.
• Fitbod: AI-driven strength training app that generates personalized workouts based on recovery and history. Overlaps with Stronger's AI Routines and adaptive routine features and is a direct competitor named in Stronger's comparison pages.
• Hevy: Closely comparable workout tracker for strength training with social feeds, routines, and progress charts. Stronger maintains a dedicated comparison page against Hevy, and both compete for the same lifter persona.
• JEFIT: Long-standing strength training tracker with a large exercise database, routines, and progress tracking. Listed by Stronger as a direct competitor and serves the same individual lifter segment.
• StrengthLog: Strength-focused workout tracker originating from the Stronglifts ecosystem, with routines and progress analytics. Stronger lists StrengthLog as a competitor; both target the same self-directed lifter.
• RepCount: Workout logging app focused on set/rep/weight tracking with a clean interface. Stronger names RepCount as a direct comparison and they target the same minimalist-tracker user.
• Strong (Strong Fitness App): One of the most established workout tracker apps on iOS and Android. Stronger explicitly compares against Strong, and both target individual gym-goers with set/rep/weight logging, routines, and premium subscriptions.

Broad incumbents

• Strava: Dominant consumer fitness tracking platform with a much broader scope (running, cycling, multisport) but expanding into strength workouts. Listed by Stronger as a competitor; relevant due to its scale, subscription model, and social infrastructure.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/stronger_app

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Stronger