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.
Sensor Play - the iPhone Sensor Playground, and the best app for serious scientific research and data recording.
$14.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Sensor Play - Data Recorder: map the core Utilities workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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
Assumption to check: Limited sensor types available for recording
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of detailed data analysis features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No cloud sync for recorded sessions
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: High upfront cost with no trial
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Sensor Play - the iPhone Sensor Playground, and the best app for serious scientific research and data recording. Used by engineers, scientists, teachers, and enthusiasts all around the world. The sensors built into all iPhones are amazing examples of the power in your pocket. To have a GPS receiver, an accelerometer, a gyroscope, even a Barometer with you at all times is a marvel of miniature engineering. It's simply fun to see the output from all these sensors, play with each interactively, or just view the raw data. Record Accelerometer, Gyroscope, GPS, Barometer, Magnetometer sensor data and share by email for further analysis, or review using the in app viewer. However Sensor Play is not just a toy. Beyond the obvious fun of watching the accelerometer and gyroscope graphs bounce around you can now record multi-sensor data all at the same time, even in the background, for a full external analysis of your, or your iPhone's, motion through time and space however you so desire. And now with Automation you can trigger your recordings to start either after a simple delay, when you enter or leave a preset GPS Region, or when the iPhone is nudged above a selected gForce. Then end your recordings either after a set duration, or when you enter or leave a preset GPS Region. Automation makes getting the data you want so much easier, and eliminates lots of unnecessary recorded data. Set up the triggers as required, close the phone and go. Set and Forget! Later when you open SensorPlay the data you were after will have been automatically recorded and saved for you. The following data is recorded to a csv file for sharing through the standard iPhone share sheet. Timestamp Accelerometer: X, Y, Z Gyroscope: X, Y, Z Attitude: Roll, Pitch, Yaw Location: Longitude, Latitude, Speed, TrueHeading, Altitude Motion Activity: Type & Confidence Barometer: Pressure, Relative Altitude Magnetometer: µT X, Y, Z, calibrated x,y,z, rotation matrix, and quaternion Visual graphs of sensor recordings in one place, as long as they're not too large anyway. Background mode is supported for all recordings, accelerometer, gyro, and multi-sensor export, lock your screen and keep recording all sensor data for up to six hours. A serious engineering, scientific, and educational analysis tool. Sharing of all recordings is now through the built in share options which includes, Airdrop, mail, message, notes, dropbox (if installed), etc. Sensors currently supported: Barometer (iPhone 6 and above only) - see the atmospheric pressure in a choice of 7 units, see your relative altitude plotted over time. - Widget available to display the atmospheric pressure in the notification centre. Accelerometer - See the g-forces on the X,Y,Z axis and see them traced over time. - Widget available to show gMax in X,Y,Z axis on notification screen. - Record the data and share for further analysis Gyroscope - Watch the rate of rotation over the X,Y,Z axis plotted over time. - Record the data and share for further analysis GPS/Location Services - See your exact location mapped on screen and share your Lat/Long coordinates by text or email. Magnetometer/Compass - See the magnetic field acting on the X, Y, Z, axis along with an interactive compass. 3D/Force Touch (6S ->11 only) Note: Continued use of GPS running in the background can dramatically decrease battery life.
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Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.