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.
Steel Rain is a Forward Observer training app for 13F (US Army) and 0861 (USMC) MOS soldiers, FOs, FSOs, JFOs, ROTC cadets, OCS candidates, FA OBC students, and anyone preparing for NCO/officer boards, the FIST certif...
$5.99 · 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.
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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.
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 Steel Rain Call for Fire: map the core Education 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 interactive simulations compared to real-life scenarios.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of community features for peer support.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No offline access to lessons or simulations.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited feedback on quiz performance.
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.
Steel Rain is a Forward Observer training app for 13F (US Army) and 0861 (USMC) MOS soldiers, FOs, FSOs, JFOs, ROTC cadets, OCS candidates, FA OBC students, and anyone preparing for NCO/officer boards, the FIST certification, or company-level fire-support positions. WHAT YOU GET • BASIC TRAINING — Nine interactive classes covering Call-for-Fire format, mils & direction, map reading, OT-line corrections, the 15 subsequent corrections in doctrinal order, mil-relation range estimation, FO loadout, and fire support products. Each class follows a four-phase pattern: lessons → quiz → drills → complete. Per-attempt option shuffle. Earn XP and promote. • FIRE MISSIONS — Live adjust-fire and grid-mission scenarios. Transmit calls for fire by voice using on-device speech recognition. Walk rounds in. FDC TTS voices respond in real time. • ROC-V THREAT RECOGNITION — Identify 25 near-peer combat vehicles from silhouette: Russian armor (T-72, T-90, BMP-3, BTR-82), PLA platforms (Type-99, Type-96, ZBD-04, ZBL-08, HQ-9), Iranian variants (Karrar, Boragh, Fajr-5), and globally-fielded UAS (Shahed, Lancet, CH-4, Orlan-10). Practice mode for studying. Test mode for +50 XP per category passed. • ADVANCED PILLAR — SGT-locked classes for senior FOs and promotion study: Immediate Suppression, Final Protective Fires (plan/register/call lifecycle), Danger Close + RED (the 600m working rule), and CAS 9-Line with Type 1/2/3 control and cleared-hot procedures. • FIRE SUPPORT PLANNING PILLAR — SSG-locked, opens after all four Advanced classes. The senior planning curriculum: P1 D3A Targeting Cycle (Decide / Detect / Deliver / Assess and where the FO plugs in). P2 High-Payoff Targets & the AGM (HVT vs HPT, the HPTL, TSS, and reading the Attack Guidance Matrix). P3 EFSTs & the Scheme of Fires (the Essential Fire Support Task — TPME, task & purpose, method & effects, sequencing into a scheme of fires). P4 Integrating Fires with Maneuver (fires nested in the maneuver scheme — SOSRA breach fundamentals, trigger lines, phased fires, and a worked deliberate-breach example with the FO's exact lift/shift call). • FIST CERT PREP — 298 ATP-grounded MQF questions for the Joint Fire Support Mandatory Qualification File. Every answer cross-checked against the source publications (ATP 3-09.30 Observed Fires, ATP 3-09.32 JFIRE, FM 3-09 Field Artillery Operations, JP 3-09 Joint Fire Support, JP 3-09.3 Close Air Support) with the verbatim doctrine reference in every explainer. Official MQF test composition: SL1 = 50 SL1 questions, SL2 = 50 SL1 + 25 SL2, SL3 = 50 SL1 + 25 SL2 + 25 SL3. Practice mode, mock test mode, missed-question spaced repetition, and flashcards. DOCTRINE GROUNDING All content cites US Army FM 3-09 / ATP 3-09.30 / ATP 3-09.32 (JFIRE) / TC 3-09.8 and USMC MCRP 3-31.6, plus JP 3-09 and JP 3-09.3 for joint fires. Standards-only — no unit SOP. Target numbers use the AB#### format soldiers actually transmit. Target groups use A#A. The 15 subsequent corrections are sequenced per ATP 3-09.30. The Fire Support Planning pillar grounds in FM 3-09 with verbatim chapter and paragraph citations in the lesson text. BUILT BY AN SME Steel Rain is built by a 13F with 20 years active-duty experience. Every lesson, quiz question, and drill scenario has been reviewed against doctrine. When the doctrine and the popular convention disagree, doctrine wins. NOT A GAME Steel Rain is a training aid. Ammunition, range, and dispersion values are unclassified doctrinal approximations. Not for operational targeting. NO ADS. NO TRACKERS. NO ACCOUNTS REQUIRED.
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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.