Case Study
Dear Her
Some feelings are too big for a text message.
A free AI letter-writing app built in one afternoon on Women's Day. Write three honest prompts about a woman in your life. Claude turns them into a letter she will never forget.
Shipped in 3 Hours
Idea to live product
59% Conversion
Landing to writer
10 Countries
Zero paid distribution
Zero Paid
Distribution
At a Glance
3 Hrs
Shipped in
Idea to live product
59%
Conversion
10
Countries
Zero paid distribution
$0
Paid Distribution
Sections
The Origin
Why I Built This
My mom has spent her whole life trying to protect me from uncertainty. I have spent my whole life running toward it. New country, quit a stable job, back to school, building things that may or may not work. She has never once asked me to stop.
I built Dear Her to say what I never quite say out loud. Then I realized other people had the same problem. The gap is not feeling. It is articulation. Most people feel things deeply about the women in their lives and find no words that feel worthy of the feeling.
I shipped it on Women's Day. By the end of the day, people across 10 countries had used it to write letters to their moms, partners, sisters, friends, and mentors.
The Product
How It Works
Step 1
Choose who you are writing to
Mom, Partner, Sister, Friend, Mentor, or a custom name. The relationship shapes the tone and sign-off of the generated letter.
Step 2
Answer three guided prompts
What is a small thing she does that you never mention? Describe her in a moment only you have seen. What do you want her to know today? Each prompt is capped at 300 characters. Voice input is available so you can speak instead of type.
Step 3
Claude writes the letter
Your raw inputs are transformed into a full letter. Emotional, specific, human. Not generic. The system prompt explicitly bans em dashes because letters should feel written by a person, not an AI.
Step 4
Share a unique link
The letter lives at a unique URL. The share button copies a pre-drafted warm message to clipboard, not just a cold link. The recipient opens it and watches the letter appear typewriter-style on a warm parchment card.
Stack
LovableClaude APISupabaseNamecheapTraction
Day One and Beyond
59%
Conversion rate
10
Countries
3 Hrs
Build time
$0
Paid distribution
Conversion Funnel
↓ 41% dropped off
↓ 68% dropped off
204 direct · 26 LinkedIn · 20 Instagram · zero paid distribution
First User Comment
“Tried it and really liked it. It also made me reflect on a few things about someone I deeply love. This is beautiful, Harshit. Also really liked the voice feature, reduces a lot of friction.”
Himani Agarwal, Cornell 2026, AI and Product
Product Decisions
Every Decision Had a Reason
No photo uploads
The original concept included photos. Dropped it. Users may be uncomfortable uploading images of loved ones to an unknown service. Words-only is more private and universally accessible.
Voice input via Web Speech API
Typing feelings is hard. Speaking them is easier. Added as a tap-to-start toggle. The first user comment on LinkedIn specifically called this out: 'Also really liked the voice feature, reduces a lot of friction.' That is the only validation you need.
IP-based rate limiting at 3 letters per 24 hours
Protects against API cost abuse without requiring login. Rolling 24-hour window prevents gaming the midnight reset. A dynamic counter shows remaining letters proactively so users are not surprised by a block.
Claude API over Gemini
Lovable defaults to Gemini (free, built-in). Switched deliberately. The letter quality is the entire product. Claude produces significantly better emotional writing. Cost is approximately $0.01 per letter, negligible at current scale.
Fully anonymous, no login required
The content is emotionally sensitive. Requiring an account would create a trust barrier before anyone had experienced the product. Privacy note on the writer page: 'Your words are private. Letters are stored anonymously with no account, no name, no email attached.'
Typewriter reveal on letter open
The letter doesn't just appear, it types itself out on screen when the recipient opens the link. Reads like someone is writing it in real time. Small detail, outsized emotional effect.
Product Screenshots