App Overview

YouMail: Block Spam on iPhone icon

YouMail: Block Spam on iPhone

YouMail, Inc. · Utilities

It’s madness! Robocalls and spam texts invading your phone, bad guys selling your info to data brokers, criminals stealing your voicemail greetings for AI impersonations

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
4.7
97,432 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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A product spec, screen plans, and build steps for your coding agent.

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What's included19 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 YouMail: Block Spam on iPhone: 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 advanced machine learning to improve spam detection accuracy.

Assumption to check: Users complain about frequent spam calls getting through.

Validate with people who use this workflow before building.

Hypothesis 2

Allow users to create custom responses for spam calls.

Assumption to check: Limited customization options for blocked messages.

Validate with people who use this workflow before building.

Hypothesis 3

Redesign UI for simplicity and clarity.

Assumption to check: Users find the app interface confusing.

Validate with people who use this workflow before building.

Hypothesis 4

Implement a more user-friendly paywall that provides value upfront.

Assumption to check: In-app purchase prompts can be intrusive.

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

It’s madness! Robocalls and spam texts invading your phone, bad guys selling your info to data brokers, criminals stealing your voicemail greetings for AI impersonations . . . Enough is enough! We’re YouMail and our spam call and text blocker stops robocalls, spam, and scams so you can communicate safely. With our top-rated mobile app, you can get started now with free call and text blocking from known spammers and safer visual voicemail that bad guys can’t touch. We’ll even show you where data brokers are selling your info online. That’s all free, and it stops the most common robocalls. But since bad guys will change their numbers and use creepy tactics to trick you, you can also level up to Call Screening and additional protection services to stop 100% of spam calls today. Here is how our free service helps you: Once you download and activate spam blocking and turn on our optional safe visual voicemail, YouMail gets right to work. When a spammer calls from a number our 13+ million users have identified as bad, we block it. If a scammer texts you, we put AI to work to stop that too. And since criminals try to use voicemail to impersonate you, a safe voicemail box in the app protects you and your family from attacks. YouMail Free includes: • Call blocking to protect you from known spammers • Text blocking to stop messaging scams • In-app voicemail (optional) with “smart greetings” for added safety • Free Privacy Scan to identify where your personal info is exposed online That’s all free, and it’s one reason the Washington Post calls YouMail, “The nation’s best Robocall blocking solution.” But there’s much more we can do to keep you safe. Here is how we get you to 100% protection: Scammers do nasty things to reach you from spoofed and unknown numbers. So we built “Call Screening” into our award-winning app. When you upgrade to our Plus service, call screening will force unknown callers to prove they are legitimate, stopping 100% of robocalls. Plus, we will get your info removed from data brokers’ websites so bad guys can’t find your number and info online. We’re careful never to block family, friends, and important calls while keeping the bad guys at bay. That’s why YouMail has been featured on Good Morning America, NBC News, and more, but our dedication to safe communication doesn’t stop there. YouMail Plus includes: • Everything from free, and . . . • Call Screening to stop all the bad guys • Enhanced text and voicemail protections for added safety • Removal of your exposed info from data broker websites That’s great protection, but it’s just the beginning. We care about your privacy and productivity too. Take back your privacy and be more productive every day: With a YouMail Essentials plan, you can take the next step and add a second phone number to your iPhone. An extra phone line lets you make and receive calls and texts using a new number you choose. That means more freedom and privacy: • Use your new number for work while keeping your main number for family and friends • Give companies and acquaintances your second number to keep your main number safe • Make this your company number with “smart greetings” for customers if you have a business YouMail Essentials includes: • Everything from free and Plus, and . . . • A second number so you can keep your main number and life private From free protection that reduces robocalls and spam texts and protects your voicemail to advanced protection to screen unwanted callers or even add a private second number to your iPhone, YouMail is here to make you safe. If you are an entrepreneur, YouMail offers professional features that make running your business from your mobile phone safe, productive, and affordable (learn more at YouMail.com). Get started with YouMail today and join the more than 13 million Americans who have had enough of spam calls, robocalls, scams, and unwanted texts. It’s time to communicate safely!

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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.

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BUILD KIT DIFFICULTY
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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.