2026-07-24 04:24 UTCIn-site rewrite2 min readUpdated: 2026-07-24 04:42 UTC

Lock TF IN: an AI drill sergeant that roasts skipped workouts

LOCK TF IN is a satirical AI fitness companion that acts as a no-excuses drill sergeant, roasting your excuses to keep you accountable. It features a streak engine, training log, themes, and a privacy-first free tier with on-device AI. Pro subscription unlocks cloud AI, advanced analytics, and more.

SourceHacker News AIAuthor: symbiex

LOCK TF IN - AI Companion

Your no-excuses drill coach

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

Age Rating

13+

Years

Category

Health & Fitness

Developer

Brandon Hamilton

Language

English

Size

4.2

iPhone

A pocket drill sergeant that won't let you skip. Brutal accountability, streak tracking, and an AI coach that roasts your excuses — never you. Now with cloud AI for Pro.

LOCK TF IN is the anti-excuse fitness companion — a satirical drill-sergeant coach in your pocket that turns showing up into a streak you don't want to break.

No fluff. No 47-step onboarding. You train, you tap "I DID THE THING," and your streak climbs. Miss a day and the coach has something to say about it.

WHAT YOU GET • SAVAGE AI COACH — Talk to a no-nonsense coach that roasts your excuses, never your body. It punches at the couch, the snooze button, and "I'm too tired" — never at you. • STREAK ENGINE — Every session builds your run. Track your best streak, weekly count, and your climb to the 30-day mark. • THE LOG — Log lifts, runs, calisthenics, and more in seconds. Rest days are honorable and counted. • PRO INTEL DOSSIER — A full training-intelligence report: consistency trends, training volume, your weakest day, comeback patterns, and projections. • 8 THEMES — Repaint the whole rig. Site Yellow, Hazmat Pink, Blaze Orange and more, with matching app icons. • REST TIMER, WIDGETS & MORE — Home-screen widgets, a built-in rest timer, and exportable service records.

RESPECTS YOUR PRIVACY Free-tier AI runs entirely on your device or from the built-in library — nothing leaves your phone. No accounts. No tracking.

LOCK TF IN PRO Upgrade to Pro for the cloud AI coach with a generous weekly ration, adaptive roasts, weekly service reports, and the full Pro Intel dossier. Bring your own AI key for unlimited access.

• Weekly Pass — $1.99 / week • Monthly Deployment — $4.99 / month • Annual Deployment — $29.99 / year

Subscriptions auto-renew unless canceled at least 24 hours before the end of the current period. Payment is charged to your Apple Account at confirmation of purchase. Manage or cancel anytime in your Account Settings. Any unused portion of a free trial is forfeited when a subscription is purchased.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://locktf.com/privacy

Heads up: LOCK TF IN contains frequent strong language by design. Clean Mode masks it if that's not your thing — but the coach hits hardest raw.

Now stop reading. LOCK TF IN.

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

App Functionality

User Content