Public Guide

Letter4U features explained clearly

Letter4U is designed for people who want to share emotion online with more intention than a regular social post. This page explains what each core feature does, how the publish flow works, and what to expect when someone opens your page. If you want to create with fewer mistakes and better results, start here.

What Letter4U is best used for

Letter4U works best when you want a focused one-link experience: a love note, anniversary memory, apology message, birthday timeline, or a mini website for someone meaningful. Instead of posting fragmented content across different apps, you compose everything in one place and publish a shareable link.

The platform currently includes two creation styles. Love Letter emphasizes direct writing and private access with a 4-digit PIN. CRT TV Slideshow emphasizes visual rhythm using a retro display aesthetic and timed image playback. Both templates can include optional music links and both are designed for quick publishing without coding.

Core Capabilities

Feature groups that matter most

Template-based editor

Pick a template first, then edit title, recipient, message, signature, date, and media. The editor is designed to guide structure so you can focus on tone and message quality.

PIN lock and reveal flow

Love Letter pages require a 4-digit PIN before content appears. This creates a private-feeling reveal moment and prevents accidental open access by random visitors.

Credit-based publishing

Publish cost is calculated from content weight. Text length and photo count are measured, then the required credits are computed before publish so you know cost upfront.

Cloud-synced account data

When signed in, profile data, credits, and pages stay synced through Firebase services. This keeps your pages accessible across sessions and devices.

Workflow

Publishing flow from draft to shared link

  1. 1. Select a template. Choose based on message style: emotional letter or visual slideshow.
  2. 2. Build your content. Add title, recipient, core message, optional photos, and optional YouTube link.
  3. 3. Validate required fields. Love Letter needs PIN and core text. CRT needs enough media to tell a visual story.
  4. 4. Review credit requirement. The app calculates expected cost before publish to avoid surprise deductions.
  5. 5. Publish and copy URL. After publish, you get a viewer link that can be shared in chat, social media, or messaging apps.
  6. 6. Manage from My Pages. Re-open, update, or remove entries from your dashboard as needed.

Privacy, safety, and expectation setting

Letter4U is built for thoughtful sharing, but any link-based page should still be treated as shareable content. PIN lock adds a gate for Love Letter pages, but no link system is the same as high-security private storage. Avoid putting sensitive legal, financial, or identity information inside published pages.

  • Only share viewer links with people you trust.
  • Use meaningful but non-obvious PIN combinations.
  • If a page is no longer needed, remove it from your account tools.
  • Always preview before sending, especially on mobile.