App Overview

Exposir icon

Exposir

Riku Kuse · Photo & Video

Exposir is a precise, intuitive light meter designed for photographers who want full control over their exposure — whether shooting with a film camera, manual lens, or any camera without automatic metering.

$2.99

PRICE
$2.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet

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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Build Kit

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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's included16 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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Free quick prompt For a smaller starting point

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 Exposir: 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

No watermarks, premium for HD export only

Assumption to check: Watermarks on free tier

Validate with people who use this workflow before building.

Hypothesis 2

Chunked processing with progress indicator

Assumption to check: Crashes on large files

Validate with people who use this workflow before building.

Hypothesis 3

AI-powered filters and one-tap enhance

Assumption to check: Limited filters

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

Exposir is a precise, intuitive light meter designed for photographers who want full control over their exposure — whether shooting with a film camera, manual lens, or any camera without automatic metering. REAL-TIME LIGHT MEASUREMENT Exposir reads the light in front of you instantly, displaying EV values with smooth, accurate updates. No guesswork — just the data you need to make the right exposure decision. THREE METERING MODES Switch between Average, Center-Weighted, and Spot metering in one tap. In Spot mode, simply tap anywhere on the screen to meter exactly where you need. MONOCHROME PREVIEW See the scene in black and white before you commit. Ideal for previsualizing tonal separation when you're shooting B&W film. LIVE HISTOGRAM A real-time luminance histogram shows exactly how the tones fall, so you can catch clipping before it costs you a frame. MAKE IT YOURS Color-code individual apertures and shutter speeds, and set the background, frame and slider colors to match how you work. EXPOSURE COMBINATION AT A GLANCE The built-in exposure slide rule shows aperture and shutter speed combinations side by side, so you can find the right settings in seconds. LOCK YOUR EXPOSURE Lock the screen and take your time — compose your shot and consider your exposure without rushing. Exposir acts as a second viewfinder, giving you the freedom to think before you shoot. ZOOM & FOCAL LENGTH Built-in zoom control lets you recreate the exact focal length of your camera lens, right from your iPhone. FINE EXPOSURE COMPENSATION Adjust exposure compensation with an intuitive slider, in steps as fine as 0.1 EV — or switch to 0.2, 0.3 or 0.5 EV increments to match how you work. LONG EXPOSURE MODE Planning a long exposure shot? Exposir calculates the correct shutter speed for any ND filter combination, then counts down with a built-in timer — with pause, resume, and a notification when your exposure is done. The countdown keeps running on your Lock Screen and in the Dynamic Island, so you can put your phone down and just watch the scene. Every completed exposure is saved to your history. CLEAN. FAST. ALWAYS READY. Exposir launches instantly and stays out of your way. No subscriptions, no ads — just a reliable tool that works every time you raise your camera. WIDGET SUPPORT Add Exposir to your Home Screen or Lock Screen with the built-in widget — launch the app instantly, right when the light catches your eye. Exposir requires camera access for light metering.

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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
FFmpeg
Supabase Storage
RevenueCat
BUILD KIT DIFFICULTY
Advanced

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.