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
Russian Verb Trainer
Learn to conjugate the 600 most common Russian verbs in all tenses and in the imperative mood
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.2
18 ratings · Top 30%
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.
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What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Russian Verb Trainer: 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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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
Expand the library of verbs and include user submissions.
Assumption to check: Limited verb selection compared to other language apps
Validate with people who use this workflow before building.
Hypothesis 2
Implement guided tutorials and tips.
Assumption to check: High learning curve for beginners
Validate with people who use this workflow before building.
Hypothesis 3
Add gamification elements like achievements and leaderboards.
Assumption to check: No gamification features
Validate with people who use this workflow before building.
Hypothesis 4
Create a community forum or chat feature for users.
Assumption to check: Lack of community support
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
Learn to conjugate the 600 most common Russian verbs in all tenses and in the imperative mood. Listen to the pronunciation of conjugated forms. Track your progress with statistics. VERB LISTS: make your own lists of verbs or use the predefined lists: "All Verbs", "Basic Verbs", "Reflexive Verbs" and "Verbs of Motion". ASPECT: learn to which aspect the verb belongs. For many verbs, the aspectual pair is provided. PRACTICE: enter the conjugated verb form, the infinitive or the translation and get visual feedback. VOCABULARY TRAINER: activate the options "Infinitive" and "Translation" in "Training Preferences" to learn Russian verbs. TRACK PROGRESS: see ratings for each verb and decide which verbs to focus on. CUSTOMIZE EXERCISE: filter the verbs based on tenses/mood and/or ratings within the selected list of verbs. VERB CONJUGATION TABLE: for each verb, there is a conjugation table including translation, transcription, aspectual partners (if available), conjugation type and audio of all forms in present, past and future tenses and in the imperative mood. AUDIO: conjugation forms of all verbs pronounced by a native Russian speaker. SEARCH: quick verb search (both language directions). Please, send us your comments and suggestions to help us improve the App. Propose verbs you would like to see in coming updates. FACEBOOK - https://www.facebook.com/russlandjournal X - https://x.com/russlandjournal/ YOUTUBE - https://www.youtube.com/@RusslandJournal WEBSITE - https://www.russlandjournal.de/en/
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
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Axios
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BUILD KIT DIFFICULTY
Intermediate
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.
