App Overview

RealCall - Spam Call Blocker icon

RealCall - Spam Call Blocker

Second Phone Number Inc · Utilities

RealCall - The Fastest and Most Effective Way to Stop Spam Calls!

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
4.5
24,689 ratings · Top 15%

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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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/
Preview a sample Build Kit No email needed

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 RealCall - Spam Call Blocker: map the core Utilities 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

Implement a feedback system to improve detection accuracy.

Assumption to check: Users often report that spam call detection is not always accurate.

Validate with people who use this workflow before building.

Hypothesis 2

Optimize data fetching and caching for faster access.

Assumption to check: App can be slow to load blocked call history.

Validate with people who use this workflow before building.

Hypothesis 3

Allow users to customize notification sounds and types.

Assumption to check: Limited customization options for notifications.

Validate with people who use this workflow before building.

Hypothesis 4

Provide clear explanations of subscription tiers and benefits.

Assumption to check: Subscription model 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

RealCall - The Fastest and Most Effective Way to Stop Spam Calls! Tired of being interrupted by robocalls and telemarketers? RealCall, powered by advanced AI and machine learning, automatically identifies and filters out 99% of spam calls, robocalls, telemarketers, scam calls, unwanted calls, unknown calls and no caller ID calls! With over 3 million spammers blocked, RealCall is your ultimate solution. This innovative app utilizes cutting-edge technology to ensure that you never fall victim to spam calls again. RealCall has analyzed millions of callers and successfully blocked 99% of spam calls for its users. 【Realcall Premium: Upgrade Your Protection】 Level up your experience and unlock the full potential of RealCall with our Premium subscription: ● Ad-Free: Enjoy a clean, distraction-free interface. ● AI-Powered Advanced Blocking: Enhanced filtering technology to intercept even the most sophisticated spoofed numbers. ● Precision Caller ID: Get instant, high-accuracy identity lookups for unknown callers—know exactly who’s on the line. ● Family Plan: Protect your entire household by sharing your Premium account with up to 5 members. ● Personalized Voicemail Greetings: Set custom greetings for your voicemail to professionalize your communication. ● Free Trial for New Users: Experience all premium features risk-free. 【Free Features: Essential Secturity For Everyone】 Download RealCall today and enjoy these powerful protection tools at no cost: ● Fraud SMS Detection: Advanced Core ML filtering to quarantine phishing texts and scam links into a separate junk tab. ● Custom Blocklist & Whitelist: Add unwanted callers to your own block list and whitelist previously blacklisted numbers. ● Smart Call Alerts: : Get alerts for callers flagged as "Scam Likely" and "Spam Risk". 【How to Block Spam Calls with RealCall?】 RealCall's innovative technology analyzes incoming calls from unknown numbers and detects spam before your phone rings. Say goodbye to annoying calls and enjoy peace of mind with RealCall. 【24/7 Phone Spam Protection】 RealCall is committed to reducing the spam calls you receive. It works with all carriers. Activate the spam call blocker for 24-hour call protection, robocall blocking, unknown caller blocking, and more. 【Subscription Details】 • Payment will be charged to your iTunes Account upon confirmation of purchase. • Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. • Account will be charged for renewal within 24 hours prior to the end of the current period and will identify the cost of the renewal. • Subscriptions can be managed by the user, and auto-renewal can be turned off by going to the user's Account Settings after purchase. • No cancellation of the current subscription is allowed during the active subscription period. • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. • You can cancel a free trial or subscription anytime by turning off auto-renewal through your iTunes account settings. This must be done 24 hours before the end of a free trial or subscription period to avoid being charged. The cancellation will take effect the day after the last day of the current subscription period. For prompt support, email the RealCall team at [email protected]. Follow us at https://twitter.com/RealCallAI and https://www.facebook.com/SpamcallsBlocker Terms of Service: https://www.realcall.ai/terms Privacy Policy: https://www.realcall.ai/privacy

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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
Redux
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expo-permissions
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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.