App Overview

Pinhole Assist icon

Pinhole Assist

Le bord de la piscine · Photo & Video

*** Feb 8, 2019 "My favorite pinhole app!! "This is my go to app for pinhole photography…this has made getting good results much easier…" bizzy

$2.99 · In-app purchases

PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.9
19 ratings · Top 5%

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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A product spec, screen plans, and build steps for your coding agent.

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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.

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.

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

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for Pinhole Assist: map the core Photo & Video 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

Introduce more comprehensive exposure calculations and advanced settings.

Assumption to check: Limited advanced features for serious photographers.

Validate with people who use this workflow before building.

Hypothesis 2

Integrate a community feature for users to share their experiences.

Assumption to check: Lack of user community for sharing tips.

Validate with people who use this workflow before building.

Hypothesis 3

Add an onboarding tutorial to guide new users through features.

Assumption to check: No tutorial for new users.

Validate with people who use this workflow before building.

Hypothesis 4

Simplify the paywall and clarify benefits of premium features.

Assumption to check: In-app purchase system can be confusing.

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

*** Feb 8, 2019 "My favorite pinhole app!! "This is my go to app for pinhole photography…this has made getting good results much easier…" bizzy *** Dec 16, 2016. "Wow. This app blew me away with its features and calculations (especially reciprocity fail). - Horacekenneth *** Feb 19, 2014 Wonderful!! "This app is perfect for the pinhole photographer in the field. I love that I can save settings for all my cameras and recall them instantly in the moment. - Papskier" *** So useful! May 26, 2013 "This takes the guesswork out of exposure calculation, since it turns your iPhone into a light meter and suggests the correct exposure! Works like a charm. Great app for pinhole photographers." *** May 16, 2012 : "Pretty much the perfect app for pinhole", Gavin Lucas *** March 26, 2012 "Pinhole photography - Great app! This will make pinhole photography much simpler to do", Zone v *** November 28, 2011 "Great solution !! - Thank you for this Pinhole timing app. I have many different pinhole cameras and this will help me figure timing on all of them. Thank you !!Greg." Pinhole Assist will be your companion to argentic and numeric pinhole, as well as view camera photography and wet-plate . The range of aperture and sensitivity (starting at 0.05 ASA ) allows for film, photo paper, wet-plate and as well as pinhole. * Built-in camera computes exposure; * alternatively enter EV reading for any lightmeter * or enter time metering to compute reciprocity effect. * Use built-in exposition timer and bubble level for optimal shot; * The light meter has a spot-meter feature and allows for incident metering; * Enter your camera aperture from the predefined list (170+ pinhole cameras) or compute it; * Let the assistant automatically compensate for reciprocity of film (correction for long exposures, 60+ different curves included), or use your own curves. * Save, restore and presets (combos) : aperture, predefined cameras, ASA and reciprocity settings • 30+ builtin filters (red, ND…), add your own, mafast acess your favorites , * Log shot information : preview, exposure, metering, location, interactive map , date and a shot. Export as picture, CSV or JSON file. You can create film and set reciprocity curve from within Pinhole Assist. Crete new ones, or tweak existing ones. Use iTunes (on Mac/PC) to import/export access the films you created, or exchange them via email m curves (Go to the app Web Site for instructions) * timer usability : now tapping the chrono icon directly starts the timer starting the chronometer automatically create a log. * Combos : edit for your camera+ film combination (combo) the aperture or the predefined camera, as well as film speed and reciprocity. * Choosing a film reciprocity now sets the film speed. * 119 different films, including Multigrade paper and Harman positive paper * 300+ different pinhole and zone plate cameras : Ondu, Diana, Holga, Sténoflex, Reality soSubtle, Lensless, Ilford, Stenopéika, Vermeer, 8banners, ZeroImage, Leonardo, Carlos, Nopo, Spiral, Sharan… Any other camera can be accommodated. Go to the Settings to : * adjust scales can be by ½ EV or ⅓ EV, * enable bellow correction: a button will appear on the main screen to allow bellow adjustment, allowing to use view cameras; * adjust the cell and incident metering constant; * start the timer automatically or not; * adjust log behavior. Please note: this is not a camera app: it does not take picture. This is a sophisticated exposure calculator to take argentic (ou DSLR) shots with an pinhole camera.

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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
React Native
Expo
Zustand
React Navigation
React Native Paper
TypeScript
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.