Fitness app developers behind SWEAT & 50M+ users.

Basic personal-trainer apps with workout tracking and video libraries cost $100K-$150K (3-4 months). Standard fitness apps with community features and nutrition tracking cost $150K-$300K (4-6 months). Advanced fitness platforms with live streaming, multi-trainer marketplaces, and AI personalisation cost $300K-$600K (6-12 months). Ongoing costs include server hosting, video CDN, App Store fees (15-30% of subscription revenue), and maintenance.

MVP fitness apps take 3-4 months. Standard fitness apps with comprehensive features take 6-9 months. Advanced fitness platforms take 9-15 months. SWEAT’s MVP shipped in 4 months - validating product-market fit before expanding. Traininpink launched cross-platform in 3.5 months using Flutter.

Workout tracking, video exercise demonstrations, progress visualisation, timer functionality, personalisation, offline functionality, and push notifications. Advanced features driving retention include wearable integration, social and community, nutrition tracking, habit tracking, achievement systems, and subscription payments. Social features increase 12-month retention 40-60% over solo apps.

For most projects we recommend cross-platform with Flutter - 40% cost savings versus building two native apps, faster time-to-market, single codebase. Choose native iOS/Android when you need bleeding-edge wearable features, Apple Watch as a core workout experience, performance-critical features (AR, complex 3D), or platform-specific functionality essential to your concept.

iOS apps integrate HealthKit (heart rate, calories, steps, workouts, sleep - bidirectional), native Apple Watch apps with complications and standalone workout sessions, and background sync. Android uses Google Fit, Wear OS, and Samsung Health. Third-party wearables integrate via manufacturer APIs (Fitbit SDK, Garmin Connect IQ, Polar AccessLink, Whoop). SWEAT’s Apple Watch integration increases workout frequency by 35%.

Subscription generates the highest lifetime value. SWEAT’s $19.99/month model peaked at $100M+ annually. Typical fitness app pricing is $9.99-$29.99/month or $79.99-$199.99/year. Freemium works for rapid acquisition (2-5% conversion in 90 days). Alternative models include one-time premium ($29.99-$99.99), IAP, B2B2C white-label for gyms ($5-$15 per employee), and hybrid subscription-plus-IAP.

Yes. Trainers have major advantages: proven methodology, existing client base for beta and early subscribers, established credibility, and the ability to produce authentic workout content. SWEAT started with Kayla Itsines’ BBG methodology and her Instagram audience. Success factors: validated methodology, defined niche, content production capability, an engaged audience even if small, and a business mindset. Typical MVP investment for trainer-led launches is $120K-$150K.

Three factors we optimise: efficacy (workouts produce real results), engagement (the app is enjoyable and habit-forming), and community (social accountability sustains motivation). Key retention drivers: structured progressive programs, visible progress tracking, achievement systems, social features (40-60% lift), personalisation, workout variety, and strategic push notifications. Retention killers: unclear progression, poor video instruction, technical issues, overwhelming complexity, and lack of quick wins in the first 7 days.

Yes. Post-launch support covers iOS/Android OS updates, performance monitoring, wearable-API maintenance, new feature work, CMS support, server scaling, ASO, analytics, and product guidance. Retainers run on a four-week story-point model from $10K (Steady) up to $50K (Momentum), with Enterprise priced on application. We have maintained SWEAT for 7+ years through dozens of platform updates, new trainers, feature expansions, and infrastructure scaling.