Opportunities › Unified wearable health data API › Proposed app
Tidewell
One API for wearable health data, cleaned and in one shape
- Score
- 28
- confidence 45
- Evidence
- 4
- items on the page
- Rivals
- 3
- named in sources
- First version
- 45 d
- estimate
- Type
- Desktop app
- PWA: runs in the browser, installs on Mac and Windows
- Market since
- 2014
- Established market · AI estimate
ScreensConcept
Desktop app: Developers integrate the API into applications and review wearable data in analytics dashboards, dense tables and exports during development work. Sample screens on a computer, in the proposed brand. Their numbers are sample data.
Connections
Healthy128
About this appAI proposal
Tidewell gives teams building health apps one API for data from wearables and health platforms. Your users connect their devices once through a hosted consent screen. You read sleep, heart rate, workouts and activity in a single, consistent format.
It is made for developers at small health-tech companies, analytics teams and quantified-self app builders who today write and maintain a separate connector for each platform. Tidewell handles sign-in, syncing and unit conversion, and keeps the source of each reading.
What sets it apart: a dashboard that shows which users are connected and where a sync failed, plus a plain export of normalized data for analysis or AI work. You can see how each value was transformed.
- Tagline
- Build once. Read every wearable.
- Voice
- ClearCalmPrecise
- Why this name
- A tide well is a calm pool where many streams settle. It suggests data from many sources collecting in one clear place.
In the first version
Members say which features they would use. It tells PWAS what people want; it changes no score.
One schema for every source
Sleep, heart rate, workouts and steps arrive in the same fields and units, whichever device or platform produced them.
No member yet
Hosted connect screen
Send a link or embed a widget that lets your user pick a device, grant consent and return to your app.
No member yet
Source tracing
Every value keeps its origin, original unit and transform, so analysts can check how a number was produced.
No member yet
Sync health view
See each user's connections, last sync time and failures, with a one-click prompt asking the user to reconnect.
No member yet
Brand identityAI proposal
Check the name against trademark registers before using it.
Palette
#0F3D4ADeep Tide · primary#F2F7F5Sea Foam · surface#13242BInk · text#E8664ACoral · accent#3E8E7EKelp · data
Typography
Aa
Tidewell
ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789
Build once. Read every wearable.
PricingAI proposal
The material gives no competitor prices; the platform APIs it names are shown without any. These tiers are a starting point to test, priced by connected user.
Free
Free
- Up to 10 connected users
- All supported sources
- Export and webhooks
Team
$99 a month
- Up to 500 connected users
- Sync health dashboard
- History backfill
- Email support
Scale
$499 a month
- Up to 5,000 connected users
- Batch exports
- Custom data retention
- Priority support
Enterprise
What it could be worthEstimate
What a software business making this much sells for today, from real deals. Pick a monthly revenue.
If it makes
Worth about
$194,000
Sale range $132,000 to $263,000
$120,000 a year in revenue
From 87 software businesses listed and sold on Empire Flippers in the last year, revenue vetted by the broker: they sell for about 19× their monthly revenue, most between 13× and 26×.
Measured on profit, the middle deal is 32× monthly net profit: about 2.7 years of profit.
An estimate, not an offer or financial advice. A real price depends on profit, growth, churn, how much of the work is the owner's, and the buyer.
How it would growAI proposal
How the product would reach new customers through its own use, and how the first ones would be found. A plan to test, not a result.
- Built-in loop
- Visible inside customers’ products. The hosted connect screen shows Tidewell's name and a privacy link to each end user when they link a device inside a customer's app. Developers also see it in docs and export files.
- Do they become customers?
- End users are patients or consumers, not buyers. Test whether a developer or analyst behind a customer team follows the connect-screen link and signs up. Exposure alone is unlikely to convert.
- First customers
- Small health-tech startups with 2 to 10 engineers building coaching or research apps that need data from two or more wearable platforms.
- Where to reach them
- Open-source communities: Answer integration questions in repository issues and discussions about unified wearable access, and offer a hosted option.
- Developer content: Publish guides on mapping sleep and heart rate data across platforms, with working code.
- Direct outreach: Message founders and engineers of health apps found in app stores that list several device integrations.
- First milestone
- Five teams each connect at least 20 real users and three of them pay for the Team plan within 60 days.
Why people already pay for this
- VerifiedGitHub repository gained 2627 stars in 345 days
- Public claimThe open-source project enables unified access to wearable health data across multiple platforms
- AI inferenceThe project addresses integration with major wearable platforms including Apple Watch, Garmin, and Suunto
- Public claimThe platform is designed for AI and health analytics use cases
Tech stack
Every proposal builds on the same PWA base, installable from the browser on any phone or computer. Dashed boxes are what this app adds.
- AppNext.js and TypeScript
- PWAManifest and service worker
- UITailwind CSS
- Data and authSupabase Postgres
- PaymentsStripe
- EmailResend
- HostingVercel
- This app · Background jobsQueue and scheduled worker serviceSyncing and backfilling many users' device data needs retries and rate-limit handling outside web requests.
- This app · Time-series storagePostgres time-series extension or partitioningHeart rate and activity samples arrive in large volumes and need fast range queries.
RisksAI inference
- PlatformEach wearable platform sets its own access terms, approval steps and rate limits. Some may restrict resale or require app review, and Apple health data is held on the phone, not in a cloud API.
- RegulatoryHealth data is sensitive. Customers may need data processing agreements and consent records, and rules differ by country and by use.
- CommercialAn open-source project already offers unified access, so teams may self-host rather than pay. The paid value must be the hosting, upkeep and monitoring.
- TechnicalPlatform APIs change often and report data differently, so normalization needs ongoing upkeep as sources are added.
- DataDifferent devices measure the same thing differently, so merged values can mislead analysts unless the source is always shown.
Everything marked AI proposal or AI inference was written by a model from the evidence on the opportunity page. The proposed name must be checked against trademark registers before it is used.