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.
Hyperion Timer is a beautifully designed interval timer built for serious training
$0.99 · 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 Hyperion Timer: 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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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 customization options for timer settings
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of integration with health data
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Minimal visual feedback during sessions
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.
Hyperion Timer is a beautifully designed interval timer built for serious training. Whether you're doing Tabata, HIIT, EMOM, or your own custom protocol, Hyperion delivers precise timing with stunning visuals — and tracks your workout right on the Dynamic Island. DYNAMIC ISLAND & LOCK SCREEN Your workout lives outside the app. Hyperion pushes a Live Activity to the Dynamic Island and Lock Screen so you can glance at: • Current phase (Warmup, Work, Rest) with color-coded icons • Live countdown timer that ticks in real time • Round progress and exercise name • All without unlocking or switching apps Put your phone down mid-set and still know exactly where you stand. BUILD EXERCISE-BASED WORKOUTS Go beyond simple rounds. Hyperion's workout builder lets you assemble full routines from a library of 45+ exercises: • Browse by category — Upper Body, Lower Body, Core, Cardio, Full Body, Stretch • Configure each exercise independently — sets, duration, rest time • Rename exercises and pick custom icons to make them yours • Drag to reorder with a long press • Scroll-wheel pickers for fast, precise number entry The timer sequences through every exercise automatically — work phases, rest phases, and everything in between. GORGEOUS ANIMATED TIMER Watch the glowing progress ring animate smoothly through each phase. Color gradients shift between warmup, work, and rest to give you instant visual feedback without looking away from your training. BUILT-IN WORKOUT PRESETS Get started immediately with four professionally-designed interval workouts: • Tabata — 20 seconds work, 10 seconds rest for 8 rounds • HIIT Classic — 30 seconds work, 15 seconds rest for 10 rounds • EMOM — Every Minute On the Minute, 50 seconds work, 10 seconds rest • Pyramid — Variable intervals that build up and back down CREATE YOUR OWN WORKOUTS Build unlimited custom workouts tailored to your training style: • Set your own work and rest durations • Choose the number of rounds • Add a warmup countdown • Pick from 10 vibrant color themes • Save and reuse your favorite workouts FULL CONTROL VIA SETTINGS Tune every aspect of the experience: • Keep Screen Awake — Prevent dimming during workouts • Sound Effects — Toggle countdown beeps and phase alerts • Background Audio — Hear alerts even when the app is minimized • Haptic Feedback — Vibration on taps, transitions, and completion • Dynamic Island — Enable or disable Live Activity (iOS) DESIGNED FOR TRAINING Every detail is crafted for gym use: • Large, readable timer display • Countdown beeps for the final 3 seconds of each phase • Haptic feedback on every phase transition • Dark theme reduces eye strain and saves battery • Polished animated launch sequence WORKS COMPLETELY OFFLINE All your data stays on your device. No account required. No internet needed. Just open the app and start training. NO ADS. NO SUBSCRIPTIONS. Hyperion Timer is a one-time download. No recurring fees. No premium tiers. No interruptions. Just a focused tool for focused training. Perfect for: • High-intensity interval training (HIIT) • Tabata workouts • CrossFit & functional fitness • Circuit training • Kettlebell & dumbbell workouts • Bodyweight training • Running intervals • Boxing rounds • Yoga flows • Any timed exercise protocol Download Hyperion Timer and experience the most beautiful way to train with intervals.
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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.