App Overview

ER70 EVP Recorder icon

ER70 EVP Recorder

Streamside Software, LLC · Entertainment

From the creators of Spirit Story Box, the ER70 EVP Recorder emulates a discontinued vintage physical digital recorder which is famous for capturing Electronic Voice Phenomena (EVPs)

$6.99 · In-app purchases

PRICE
$6.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.9
11 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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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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> SELECT BUILD PLATFORM:

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

// RORK SYSTEM PROMPT
Rork plan preview for ER70 EVP Recorder: map the core Entertainment 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

Provide basic editing tools like trimming and volume adjustment.

Assumption to check: Limited editing features for recordings

Validate with people who use this workflow before building.

Hypothesis 2

Integrate with cloud services for backup and sharing.

Assumption to check: No cloud storage options

Validate with people who use this workflow before building.

Hypothesis 3

Add functionality to share recordings directly via social media or messaging apps.

Assumption to check: Lack of sharing features

Validate with people who use this workflow before building.

Hypothesis 4

Implement a simple onboarding process to guide new users through features.

Assumption to check: No user tutorial or onboarding

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

From the creators of Spirit Story Box, the ER70 EVP Recorder emulates a discontinued vintage physical digital recorder which is famous for capturing Electronic Voice Phenomena (EVPs). The ER70 EVP recorder is for entertainment purposes only. Here are some key features: • Legendary Signal Path: Replicates the signal path of a famous 1990’s digital recorder which currently sells for thousands of dollars on online auction sites • 3D styling: inspired by the aesthetics of original device, the ER70 is dynamically rendered in realtime, and set against 360º photographs of haunted and scenic locations • Physical Based Rendering (PBR): Lighting and reflections change as iPhone is rotated • Simple operation: Easy to use, difficult to mess up • Voice Activated System: Let the app automatically record audio changes. Watch for the blink! • Seven Minute Sessions: The ER70 limits sessions to seven minute intervals. No more searching through hours-long recordings • Tagging: the ability to log where in a recording an anomaly can be heard • Easy saving and sharing: How many files get stuck on your physical digital recorder? • 5-second skip and rewind: It shouldn't be difficult to quickly review a file with your friends. • Optional Geolocation: Have you ever recorded a file and later wondered where the EVP session took place? • Favoriting: You should be able to identify your best recordings at a glance. • Easy file renaming: Renaming a recording is as simple as slowly tapping twice on a file name. • Accessibility features: For persons with disabilities Instead of heavily investing in a used piece of gear which is destined to wear out, why not spend a fraction of that on an app which offers so much more?

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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
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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.