# Duotronic — Retro calendar & reminders > Retro calendar & reminders (iPhone/iPad app by 1640 LLC.) - Source: https://appshunter.io/ios/app/duotronic/id6826496236 (this page in markdown: same URL + `.md`) - Developer: [1640 LLC](https://appshunter.io/developer/1728764577) - Category: Productivity, Utilities - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 27.0 · 13 MB - Languages: American English - Released: 2026-11-05 - Data updated: 2026-11-07 ## What is Duotronic? Duotronic puts your calendar and reminders on a retro-futuristic console of rounded color bars and panels. It works with the Calendar and Reminders already on your device, so everything stays in sync with Apple's apps and your accounts. Every button is a chunky segment with a satisfying synthesized sound. YOUR CALENDAR • DAY: an hour-by-hour timeline, with overlapping events side by side and a line marking now. • WEEK: seven days at a glance. • MONTH: each day lists its events and tasks; tap a day to open its agenda. On an open iPhone Duo, the month spans both screens. • AGENDA: one scrolling list of events and tasks together, with overdue tasks just above today. Show everything, only events, or only tasks. • Swipe through days, weeks, and months: the page follows your finger. Swipe back from any record. • Create and edit events with a calendar, location, notes, availability, alerts, and repeat rules. For a repeating event, change just this one or all future ones. • Tap an event's location to open it in Apple Maps or another maps app. A meeting link opens directly. TASKS • Smart lists TODAY, SCHEDULED, ALL, and COMPLETED, plus all your Reminders lists, in groups you can collapse. • Sort each of your lists by due date, date added, priority, or title, or drag tasks into your own order, synced through iCloud. • Overdue tasks are never hidden: a RED ALERT banner tops every list, and the widgets show them first. • Due dates with or without a time, alerts, priority, repeat, and notes. • Tap a checkbox to complete a task in the list. PLAIN-LANGUAGE EVENTS AND TASKS Type "Lunch with Sam Friday at 12:30 at Cafe Roma" in AGENDA, or "Call mom at 5pm, remind me an hour before", and Duotronic shows what it will add before you tap ADD: the time, place, alert, and any calendar, list, repeat, or priority you mentioned. One tap switches event and task. New event and task forms take a description too. Apple's on-device model reads your words, so they never leave your device. Requires Apple Intelligence; elsewhere, text is added as written. NOTIFICATIONS Optional, Time Sensitive notifications at your events' and tasks' own alerts. Snooze an event or complete a task from one, or tap it to open the item over AGENDA. Ones for finished, deleted, or moved items clear themselves. LIVE ACTIVITY Events with alerts get a Live Activity at their first alert: a countdown, then the time left, with snooze on the Lock Screen. Tap TRACK to follow any timed event. WIDGETS • Home Screen widgets: Chronometer, Agenda, Tasks, Month, Clock, and Clock and Agenda. • The Clock and the Clock and Agenda widgets are made for StandBy. • Lock Screen widgets for your next item, your open tasks, and the date. EVERY SCREEN • On iPhone Duo, open it like a book and the console spreads across both screens: lists on one page, details on the other. Turn it sideways and the pages stack; half open on a table, the lower half becomes a keypad. • Closed, and on every other iPhone, it fits one screen. On iPad, larger windows show two columns. SEARCH Find events from a year back to a year ahead, and tasks in every list. VOICE AND AUTOMATION Ask Siri to add a task, schedule an event, show today, or track your next event in Duotronic, or use the same actions in Shortcuts. MAKE IT YOURS • 24-hour or 12-hour time, and dates in day-month-year order or your region's format. • Capitalized entries, the first day of the week, interface sounds, and haptics. • Which calendars and lists show, and each one's color. • Where new items go, and the list TASKS opens to. • Whether DAY, WEEK, and SEARCH show completed tasks, and where a tapped notification opens. SUPPORT MY WORK Duotronic is free. CONFIG > SUPPORT MY WORK offers three optional tips for its independent developer. Tips unlock nothing. PRIVATE BY DESIGN No account, no ads, no tracking. Duotronic collects no data: your events and tasks stay in Calendar and Reminders, plain-language entry runs on your device, and Apple handles tips. ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | A Nice Lunch | $20.00 | one-time | | A Thank-You | $1.00 | one-time | | A Coffee | $5.00 | one-time | ## Is Duotronic safe? Not enough ratings yet to assess Duotronic. ## Is Duotronic legit? Duotronic appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Duotronic is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 2 releases) ### 1.0.2 — 2026-11-06 Bug fixes and performance improvements. ### 1.0.1 — 2026-11-05 No release notes. ## More apps by 1640 LLC - [Keepers - Magic Video Capture](https://appshunter.io/ios/app/keepers-magic-video-capture/id6738876712) - [Viewloop](https://appshunter.io/ios/app/viewloop/id6759014217) - [Accorduon](https://appshunter.io/ios/app/accorduon/id6824081415) All apps by 1640 LLC: https://appshunter.io/developer/1728764577 ## Related topics [caldown](https://appshunter.io/ios/topics/caldown) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-07.*