Mobile app studio

Simple mobile apps. New technology inside.

Peakvailon makes apps for your phone. We love putting new technology into products (speech recognition, AI models, widgets, system alarms) and hiding it behind a screen with very few buttons. You just say one sentence.

See our apps Talk to us

Apps

Apps we build and run

Each app does one everyday job well, with new technology doing the heavy lifting.

Dusk app icon

Dusk: Tasks, Notes & Expenses

iPhone and iPad · Free, with a Pro plan

Log expenses, add tasks and keep what you want to remember, in one spoken sentence.

  • Hold the mic, say it, let go to review. Tap the words to fix them, or send right away.
  • Spending by day and month, with charts by week or category.
  • Tasks with dates, times, repeats and on-time reminders.
  • A private memory: see and delete anything Dusk has kept.
  • Available in English, Tiếng Việt, 简体中文 and 日本語.
View Dusk on the App Store
Dusk: a spoken sentence shown as text to review before sending
Say it, then review
Dusk: the Expenses screen with today’s total, this month’s total and a 7-day chart
Where the money went
Dusk: today’s tasks in time order
Today’s tasks

More Peakvailon apps are on the way.

Technology

Technology we put to work

A technology stays in our apps only if it makes something faster. Here is how it runs in Dusk today.

  • Speech

    Words appear as you speak

    iOS speech recognition puts your words on screen while you are still talking. Let go of the mic and the sentence is ready to review.

  • LLM

    Understands natural sentences

    “Coffee, $5” becomes an expense. “Call Mom tomorrow at 8” becomes a task with a time. Everyday phrases are read on the device; harder ones go to an AI model (Pro). Nothing is saved until you confirm.

  • Vector search

    Remembers meaning, not just words

    Pro memory finds what you once told it by the meaning of your question, without the exact words.

  • Vision

    Receipts into expenses

    Send a receipt photo, a PDF or a CSV. AI splits it into expenses for you to review before importing (Pro).

  • WidgetKit · AlarmKit

    Built into the system

    Widgets on the Home Screen and Lock Screen. Important tasks can ring like an alarm, even in Silent mode or Focus (iOS 26).

  • OTA

    Same-day fixes

    Most fixes reach your phone the same day through over-the-air updates, with no new App Store download.

Built with: Swift · SwiftUI · React Native · Expo · TypeScript · Bun · PostgreSQL · pgvector · WidgetKit · AlarmKit · RevenueCat

How we work

How we build apps

  • Few buttons

    Each screen keeps one main job. The machine handles the complicated part.

  • Try early, keep what helps

    We try new technology as soon as it lands, and ship it only when it saves real time.

  • Ship steadily

    Small pieces, sent early. We read every review and fix fast.

  • Your data is yours

    See, edit and delete everything. Delete your account from inside the app.

Dusk’s release rhythm

  1. 1.2.0
  2. 1.2.1
  3. 1.2.2
  4. 1.2.3
  5. 1.2.4
  6. 1.2.5

Six versions sent to App Review in 13 days, September 2026. Over-the-air fixes shipped in between.

Contact

Have an idea for an app?

Want to work together, share feedback on Dusk, or just talk about mobile apps? Write to us.

hello@peakvailon.com

Send an email

Need help with Dusk? Visit Dusk support.