Free Reach Audit
DeadLetter reads your content's channel mix — Dopamine, Oxytocin, Serotonin, Endorphin — against what your niche's algorithm is actually rewarding this week. Then it hands you the three moves that bring your reach back.
Free Algorithm Audit
Pick the apps you use and DeadLetter estimates the time, attention, and mood the algorithm is costing you — then hands you a 7-day plan to take it back. No login. Nothing stored.
Population averages — your audit personalizes these.
The Problem
Every platform scores your content across four signals — Dopamine, Oxytocin, Serotonin, Endorphin — and rewards the mix your niche is responding to right now. When your mix drifts from what's rewarded, reach quietly dies. DeadLetter finds the gap.
Dopamine
Every post chases the same first-second hook. When your mix over-indexes on attention-grabs in a niche that's rewarding depth, the algorithm caps your reach.
Fix → add a save-worthy carousel
Oxytocin
Few of your posts invite a reply, and you've stopped answering the ones you get. Low creator-side conversation reads as a dead audience — and reach follows the conversation.
Fix → ask, then reply to every answer
Serotonin
Your niche moved toward longer, save-worthy content and your mix didn't follow. Shallow posts stop earning saves — and saves are what extend reach.
Fix → audit your last 10 for saves
Endorphins
No CTAs, no behavior-change asks. Content that never asks the viewer to do anything gives the algorithm no completion signal to reward.
Fix → one action CTA per week
The Problem
Every platform pulls the same four levers — Dopamine, Oxytocin, Serotonin, Endorphin — to keep you scrolling past the point you meant to stop. DeadLetter shows you which loops the algorithm is running on you, and the 7-day plan to break them.
Dopamine
Variable-reward loops keep you checking — every refresh might hold the hit. The feed is engineered so there's never a natural place to stop.
Fix → purge notifications, day 1
Oxytocin
The feed quietly substitutes algorithmic connection for the real thing. You feel social while getting lonelier — and the app is happy to keep it that way.
Fix → prune accounts that drain you
Serotonin
Reaching for the phone before your feet hit the floor spikes cortisol and sets your baseline mood for the day. Outrage-bait does the rest.
Fix → phone-free first hour
Endorphins
Hours of scrolling crowd out the movement that actually regulates your mood. The longer you sit in the feed, the worse the trade gets.
Fix → 20 min off-phone movement
Ninety seconds
Answer a few questions about your last 10 posts — add an analytics screenshot for a measured read — and DeadLetter scores your content against your niche's rewarded mix.
01
Choose Instagram, TikTok, YouTube or X, then your niche and size band. No login, no connecting accounts.
02
Add an analytics screenshot for a measured diagnosis. AI vision reads the numbers, then discards the image — it's never stored.
03
Your Dopamine / Oxytocin / Serotonin / Endorphin split versus what your niche is rewarding this week — with a reach-delta verdict.
04
The specific changes that bring reach back, ranked by impact for your niche. Re-run anytime — or get them weekly with Signal Reports.
Ninety seconds
Tap the apps you actually use — DeadLetter estimates the time, attention, and mood the algorithm is taking, then hands you a 7-day plan to take it back.
01
Tap the platforms you use — Instagram, TikTok, YouTube, X. No login, no connecting accounts, nothing to install.
02
DeadLetter estimates your daily screen time, how much of your feed is outrage-bait, and your algorithm-vulnerability score — in about 30 seconds.
03
Your Dopamine / Oxytocin / Serotonin / Endorphin loops mapped to what the feed is doing to your time, mood, and attention.
04
One small action a day — purge notifications, prune accounts, phone-free mornings — to reset the loops. Measure the delta on day 7.
Sample outputs
Illustrative examples — not verified user results
9 of the last 10 posts were pure hook. The fix: one save-worthy carousel a week.
Reach down, mix drifted from what the niche rewards. Three moves, not a content overhaul.
Hadn't answered the first 50 comments in weeks. Strongest oxytocin signal, gone quiet.
Sample outputs
Illustrative examples — not verified user results
Six hours a day across three apps — that's 52 days a year gone. Seeing the number was the wake-up call.
Nearly half the feed was outrage and rage-bait. The fix was pruning the accounts driving it.
Most of the scrolling happened after 10pm. A phone-free first hour reset the whole day.
Signal Reports
The audit is a snapshot. Your niche shifts weekly. The report lands before you plan the week — what got suppressed, what got boosted, which signal moved, and three fresh moves.
See plans →What lands every Monday
Sample · fictional creator
61
Score
Week 7 · Jul 20, 2026
Finance · Instagram · mix off by 60 pts
61
50 = your niche median this week.
40
mix
78
reach
62
engagement
80
consistency
Baseline: 42 finance creators in your size band
Dopamine
52
▲ overweight
Oxytocin
11
▬ shift missed
Serotonin
24
▼ starved
Endorphin
13
▬ shift missed
Your hook-heavy posts rose 40% this week, but saves/post fell 18%. The algorithm read the extra dopamine as churn bait and throttled distribution — the same trade you made in Weeks 2–4. Every point you added to Dopamine cost you roughly two points of reach. The reward this niche is paying right now is Serotonin: saves and completion, not thumb-stops.
Move 01 · Serotonin
Trade 2 hook clips for 1 carousel
Replace two of this week's hook-only reels with one 6-slide teardown carousel. Carousels are your niche's highest save-rate format and you posted zero last week.
Move 02 · Oxytocin
Reply inside the first 60 minutes
You replied to comments a median of 9 hours late. Reply to your first 20 commenters within the hour — the early-reply window is the cheapest reach lever you have.
Move 03 · Dopamine
Cap hooks at 3 posts
Hold hook-first posts to 3 this week. You're 30 points over the rewarded weight; pulling back is what lets the reach recovery continue.
67%
The thesis
We don't tell you to post more. We score your content against what your niche is actually rewarding — then hand you the three moves that bring your reach back.
The thesis
We don't tell you to delete the apps. We show you exactly what the algorithm is taking from you — your time, your mornings, your mood — then hand you the seven small moves that take it back.
Questions
The catch
The audit is a snapshot. Your niche shifts weekly. Signal Reports track your reach delta and channel mix week over week and hand you three fresh moves every Monday.
See plans →Signal from $4.99/mo · cancel anytime.
The catch
Run your Algorithm Profile, then start the 7-day Signal Stack — one small action a day to reset the loops the algorithm built. Free, and nothing is stored.
Run your Algorithm Profile →Free · no login · results in 30 seconds.