Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
App Overview
Enso Thermo - Sauna Tracker
enso thermo (formerly thermowellness) is your ultimate sauna tracker and cold plunge log—built to elevate your thermowellness routine through intuitive sauna session tracking and cold session logging
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 ratings · Top 5%
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included15 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Differentiate and validate
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Enso Thermo - Sauna Tracker: map the core Health & Fitness workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Offer integrations with HealthKit and Google Fit.
Assumption to check: Limited integration with health tracking devices
Validate with people who use this workflow before building.
Hypothesis 2
Enable users to share their progress on social media.
Assumption to check: Lack of social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Implement a reminder feature to help users stay consistent.
Assumption to check: No reminders for session scheduling
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to set preferred temperature and duration for sessions.
Assumption to check: Limited customization options for sessions
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
enso thermo (formerly thermowellness) is your ultimate sauna tracker and cold plunge log—built to elevate your thermowellness routine through intuitive sauna session tracking and cold session logging. whether you’re logging your first plunge or optimizing your 100th sauna session, enso keeps your temperature therapy journey on track. key features: - sauna session tracker: log detailed sauna sessions with time, temperature, and notes - cold plunge & cold session log: track cold therapy and plunge sessions to improve resilience and recovery - hot session logging: record your hotlog and explore benefits of heat exposure - insightful sauna analytics: visualize your trends, consistency, and performance - thermo calendar: use our calendar to maintain consistent sauna tracking and cold plunge logging - custom notes: journal thoughts and observations in your sauna log or cold plunge journal - community support: share your sauna journal and connect with other thermo enthusiasts whether you’re focused on recovery, detox, or mental clarity, enso thermo is the all-in-one tracker for your sauna, cold plunge, and thermo routine.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
React Native
Expo
Zustand
Victory Native
React Navigation
Async Storage
BUILD KIT DIFFICULTY
Starter
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.
