9 apps on the App Store

Useful iPhone apps

Each one does a single thing well, runs entirely on your device, and asks for money once — if at all.

On-device
No account
One-time
No tracking
All
Health & Fitness
Photo & Video
Finance
Productivity
Utilities
Recito app icon

Recito

Photo & Video

Teleprompter and video recorder.

Read your script close to the camera while recording video. Adjust the text and scroll speed, record multiple takes, and check your speaking pace, with on-device processing and no account.

Snapstub app icon

Snapstub

Finance

Private receipt scanner with CSV and PDF export.

Scan paper and screenshot receipts into merchant, date, total, tax, and category fields. Review the details and export a spreadsheet or PDF report, with on-device processing and no subscription.

PhotoDrift app icon

PhotoDrift

Utilities

Duplicate photo finder and photo cleaner.

Find duplicates, similar photos, blurry shots, and screenshots taking up space on your iPhone. Review and swipe through your library to clean it up, with on-device detection and no photo uploads.

Titano app icon

Titano

Health & Fitness

Food ingredient and allergen label scanner.

Scan ingredient labels against your allergens, intolerances, and diet preferences. Reads English, French, and Spanish labels on your iPhone; a reading aid, not a guarantee that a food is safe.

Servata app icon

Servata

Productivity

Home inventory for insurance.

Photograph belongings, capture serial numbers and receipts, and organize a record for insurance claims. Export PDF or CSV files, with on-device processing and no account.

Lagrange Reset app icon

Lagrange Reset

Health & Fitness

Daily energy check-in for engineers using AI.

Log how working with AI affected your energy in a short end-of-day check-in. Build awareness of your work habits with an on-device app that needs no account.

SnapDraft app icon

SnapDraft

Photo & Video

Screenshot editor with automatic privacy blur.

Turn screenshots into presentation-ready images with backgrounds and iPhone frames. Detect and blur sensitive information on your device before sharing; review the result to check what is hidden.

Kern app icon

Kern

Health & Fitness

Private sobriety tracker for iPhone.

Track your sobriety streak and milestones, with a home screen widget to keep your progress in view. No social feed or gamification.

EyeFitness app icon

EyeFitness

Health & Fitness

Guided eye exercises for screen breaks.

Follow voice-led eye exercises and the movements of Iri, an on-device eye-care companion. Take a short break from screen time, with no account or subscription.

Also on the web

  • 5 Eras

    The five eras of the software engineer.

    2025

  • PPL Study

    Canadian Private Pilot Licence exam prep.

    2024

  • EyeFitness Web

    The original browser version, still online.

    2023

  • Cognitive Biases

    Fifty ways the mind quietly misleads itself.

    2022