The Fitness App
Bloodbath.
90% of fitness apps die in year one. Not because the workouts suck, but because the founders misunderstand acquisition cost, churn, and pricing mechanics. Here is the math.
68%
Churn rate by day 30 for the average subscription fitness app. You are renting users, not acquiring them.
$3.42
Average Cost Per Install (CPI) on iOS in North America (2024). It costs money just to get a tap.
4.8
Months. The median time it takes to recoup the CAC for a $9.99/mo app. If they churn in month 3, you lose money.
The LTV > CAC Mandate
If your Lifetime Value (LTV) doesn't exceed your Customer Acquisition Cost (CAC) by a factor of 3 to 1, you are running a charity for Apple and Meta.
Stop guessing. Plug in your optimistic numbers below and watch reality crush them. Or, use our full CAC Calculator.
Quick CAC Reality Check
Warning: Highly expensive acquisition. Require $99/yr sub to survive.
The Trinity of Ruin
- Ignoring ASO: Relying purely on paid ads means you never build an organic baseline. Your blended CAC never drops.
- Poor Onboarding: A 10-screen sign-up flow without value demonstration kills 40% of installs before they see a paywall.
- Monthly Pricing Bias: Pushing $9.99/mo instead of heavily discounting the $60/yr plan starves your cash flow for UA.
App Store
Optimization
Organic search is the only way to subsidize your paid acquisition. If you aren't ranking for "workout planner" or "calorie tracker", you're dead.
ASO isn't just stuffing keywords into your subtitle. It's conversion rate optimization (CRO) for your screenshots. The difference between a 3% and a 6% App Store conversion rate literally halves your CAC.
The 3-Second Screenshot Rule
Users don't read screenshot copy. They look at the UI to see if it looks modern, and read the largest 3 words on the first two screenshots. If those 3 words don't articulate the primary benefit (e.g., "TRACK MACROS FAST"), they scroll past.
The Churn Curve: Monthly vs Annual
Annual plans look scary to users, but they are the lifeblood of a fitness app. A monthly user churns at 15-20% per month. By month 6, 70% are gone. An annual user pays upfront, funding your next month of ad spend immediately.
How to actually charge money
Hard Paywall
No free tier. 7-day trial requiring a credit card upfront. Filters out noise, maximizes immediate conversions.
High Risk, High Cashflow
Freemium (Feature Gated)
Basic workouts free. Analytics, custom plans, and macro tracking cost money. Builds massive top-of-funnel.
Requires scale
Credit System
Users buy packs of credits for live classes or premium 1-on-1 coaching feedback. Avoids subscription fatigue.
Niche applications
One-Time Lifetime
Charge $150-$250 once. Great for Q4 cash injections, terrible for long-term server costs.
Use sparingly
Uncomfortable Questions
Should I build cross-platform (React Native/Flutter) or Native?
Start with iOS Native (Swift) or React Native if your team is already web-heavy. Don't build two native apps simultaneously. 70% of fitness app subscription revenue comes from iOS anyway. Master one platform, get to $10k MRR, then port to Android.
Do I need custom workout videos?
No. At launch, use simple illustrative SVGs or highly compressed 3-second looping GIFs. Filming a 500-exercise video library costs $20k+ and delays launch by 3 months. Validate the demand first with cheap assets.
How much should I spend on ads at launch?
Zero, until you have organic baselines and crash-free analytics. Once you know your Day 1 retention is >35%, start with $50/day on Meta/Apple Search Ads to test creative. Do not scale until LTV/CAC > 1.
The Toolbelt
CAC Calculator
Calculate your exact allowable acquisition cost based on your funnel conversion steps.
LTV Estimator
Project Lifetime Value utilizing churn curves and discount rates.
Subscription Forecaster
Model MRR growth accounting for net new vs churned subscribers.
Macro Logic
Embeddable macro calculation logic (Mifflin-St Jeor) for your nutrition features.
JSON Workout Builder
Structure your exercise database correctly with our JSON schema generator.
Name Generator
Find a fitness app name that isn't trademarked and sounds somewhat aggressive.