Private Enterprise
Helix is an Apple Watch athlete recovery tracking app. It reads HRV, resting heart rate, and sleep to produce a daily readiness signal, tracks per-muscle-group fatigue so you know what's actually recovered before you train, maps VO2 max zones.
Private Enterprise
Helix is an Apple Watch athlete recovery tracking app. It reads HRV, resting heart rate, and sleep to produce a daily readiness signal, tracks per-muscle-group fatigue so you know what's actually recovered before you train, maps VO2 max zones.
Ranked #1808 on TrustMRR
233 active subscriptions
1,125 followers on 𝕏
Revenue is verified with
RevenueCat API key.Last updated: Oct 5, 2026, 11:55 AM
Turns Apple Watch data into a daily recovery score and per-muscle fatigue map
Audience
Strength athletes, runners, and quantified-self users on Apple Watch
Pricing
Freemium. 9$ monthly and 59$ yearly.
Team size
1 person
Funding
Bootstrapped
Market
Tech stack
Frontend
Backend

"Cannot manage it with my full time job and conflict of interest being in the same space."
Jonah
Founder of Private Enterprise
More startups for sale
View MarketplaceBrevik
Most people know what they want from AI but not how to ask for it. Brevik fixes the asking. You start with whatever you have — a one-line idea, a screenshot, or a URL. Brevik reads it, works out what's missing, and asks one short question at a time: who it's for, how it should be structured, what it must avoid. Every answer visibly improves a quality score computed from the fields your prompt contains — not invented by a model. Stop whenever it's good enough, then copy the finished prompt into
Revenue (30d)
$490
Asking Price
$4.9k
Multiple
0.8x
AppAlchemy
AppAlchemy is an AI powered no code builder that turns a text description into a working iOS and Android app. Users describe their idea and iterate in chat without writing code. It also includes the original app design tool at design.appalchemy.ai with its own paying subscriber base. Stack: web app, Supabase and Firebase backends, Stripe billing, LLM based generation. Two products, one Stripe account, 300 paying subscribers, 90%+ profit margins, no employees.
Revenue (30d)
$5.9k
Asking Price
$28k
Multiple
0.4x
Calerto
Calerto is the meeting alarm app that turns your calendar invites into loud, impossible-to-miss alarms — so you're always on time.
Revenue (30d)
$172
Asking Price
$3k
Multiple
1.5x
UpLinked B.V.
UpLinked is an AI web app for B2B coaches, consultants and agencies, with a live iOS app and Android in review. It analyses your LinkedIn profile, business, offer and goals, turns that into a 12-week content strategy, then writes posts in your own tone of voice, generates carousels and visuals, plans them and publishes straight to LinkedIn. It learns from your analytics with every post. The goal is not likes, but leads and clients.
Revenue (30d)
$3.1k
Asking Price
$28k
$19k
Multiple
0.5x
AI Virtual Staging
AI Virtual Staging lets real estate agents turn empty-room photos into realistic, professionally furnished property images in seconds. Upload a photo, choose a room style, and get listing-ready visuals without hiring a stager or renting furniture. AI Virtual Staging uses a credit-based model where users pay for AI-generated virtual staging images. Users can purchase credits as needed, making it affordable for real estate agents and photographers who only need staging for individual property list
Revenue (30d)
$196
Asking Price
$4.5k
$4k
Multiple
1.7x
Neume
Make songs with AI in seconds!
Revenue (30d)
$1.8k
Asking Price
$50k
$30k
Multiple
1.4x