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.
GPS Logger is device sensor log tool that enables you to record your position and your path
$2.99 · 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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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 GPS Logger Plus: map the core Navigation 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: Inaccurate GPS tracking in urban areas
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited export options for log data
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of user customization for log settings
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No offline capabilities for logging
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.
GPS Logger is device sensor log tool that enables you to record your position and your path. The data record includes GPS coordinates, attitude, speed, distance and device heading. You are able to preview the GPS Log data after recording. Features : • Record the GPS coordinate data of your iOS Devices, which are: -- Device GPS coordinate. -- Device Orientation to North. -- Device Altitude. -- Device Speed. -- Device Distance traveled. -- Plus the Time and Date of recording start. • Show Altitude Stats such as minimum altitude, average altitude and maximum altitude. • Show Speed Stats such as minimum speed, average speed and maximum speed. • Able to set Metric or Imperial units. • Lightweight, battery efficient GPS Logger. • No integrated maps while recording for power saving. • Ability to turn off screen while recording for power saving. • Rename/Delete GPS log file. • Preview recorded GPS data in detail, including map plotting and graph mode. • Works seamlessly on both iPhone and iPad. • Lightweight, compact app optimized for everyday use. • Ad-free and built with privacy in mind. GPS Log Files : • All the GPS log files can be accessed in [Files] app, [GPS Logger] Folder. • The GPS log files can be open via normal text editor. • The data array includes altitude [in Meter], compass orientation [0-360 Degree], distance traveled [in Meter], GPS Coordinates and Speed [in Meter/Second]. • The GPS data are recorded with 1.0 sec interval. • You can share GPS log files to another device via Airdrop, Messages or Mail. • To load GPS log files that share by others, simply place the GPS log files into [GPS Logger] Folder via [Files] app. Usage: • Record the track of your walking or running. • Remember the best places you've seen. • Use for long walk, hike or flight ride. • Record the trips while riding and analyse the speed, altitude or distance. • Share your tracks with your family and friends. • For OpenStreetMap map editing. • And many more depend on your imagination. Note: Turn off screen while recording for power saving, tap on the same location again to bring the screen back. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.
Written user reviews are not shown here. Check current App Store reviews >
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.