曲尺 vs Due Pal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
曲尺
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To convert from "carpenter's shaku" to "cm," you can select the input method by turning the drum-shaped dial. To convert from "cm" to "carpenter's shaku," you can input directly from the keypad, allowing for quick input and calculations.
Due Pal
This app provides a persistent visual countdown to your next scheduled event, designed to combat time blindness for individuals with ADHD. It offers customizable visual styles and smart reminders to help manage transitions between tasks and appointments.
- Persistent visual countdown
- Always-visible on Lock Screen/Dynamic Island
- Two visual styles: Flip Clock & Digital
- Smart transition reminders
- Flexible daily scheduling
- High-contrast readable design
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If you have ADHD, you know the feeling: you glance at the clock, it says 2:15. You look again — it's 4:47. Two and a half hours vanished. Your meeting started 17 minutes ago. This is time blindness. It isn't laziness or carelessness — your brain genuinely doesn't feel time passing. A clock tells you what time it is. DuePal shows you how much time you have left. HOW IT WORKS Set the anchor points of your day once: 9:30 — Stand-up 12:00 — Lunch 14:00 — Focus block 17:30 — Wrap up 18:30 — Pick up kids DuePal counts down to the next one, live. When it arrives, the countdown hands over to the next on its own — no timers to restart, no alarms to set again. Add a start time and a progress bar fills as the window runs out. ALWAYS IN SIGHT • Lock Screen Live Activity and Dynamic Island, with a Skip button • Home Screen and Lock Screen widgets in every size • Apple Watch app with complications • Control Center control, Siri and Shortcuts You never have to remember to check. The countdown is already there. A HEADS-UP BEFORE EVERY SWITCH For ADHD brains the hard part isn't the task — it's switching. Get a heads-up minutes before each due, then a reminder when it arrives. On iOS 26 and later, dues can ring as real system alarms, even in Silent mode. WORKDAYS AND PUBLIC HOLIDAYS Weekday dues skip your country's public holidays automatically — 20 countries and regions supported, including make-up workdays in mainland China and Taiwan. Skip a single day off with one tap. COUNTDOWNS FOR THE DAYS AHEAD Weekend, payday, the next public holiday, birthdays, trips and exams. Pin the one you care about to the top and to your widgets. MADE TO BE READ AT A GLANCE Six clock styles, from a flip clock to a progress ring, and twelve color themes. High contrast, large numbers, no clutter — you should know how much time you have in under a second. QUICK TO SET UP Start from routine templates or a quick 25-minute timer. iCloud keeps your dues the same on iPhone and iPad. WHO DUEPAL IS FOR Adults with ADHD who lose track of time between meetings and tasks. Students who miss class changes and study blocks. Parents juggling school pickup, meals and bedtime. Anyone who has set a 15-minute timer and been shocked when it went off "already." WHY NOT A REGULAR TIMER A timer counts a set length, stops at zero, and has to be started again every time. DuePal counts to the times of your whole day, repeats on workdays, knows your holidays and moves on to the next thing by itself. FREE AND PREMIUM DuePal is free to download. The free version includes one due, two countdowns of your own, the Live Activity, Dynamic Island and the Current Due widget. DuePal Premium adds unlimited dues and countdowns, Ring as Alarm, public-holiday skipping, the Apple Watch app and complications, the Countdowns widget, and every clock style and color theme. Choose a weekly or yearly subscription (the yearly plan starts with a 3-day free trial) or a one-time lifetime purchase. If you bought DuePal before it was free, Premium is already yours. No ads, no account. Privacy: https://elevenapril.com/privacy Terms of Use: https://elevenapril.com/terms
Screenshots
Verdict
The clearest difference is ads: Due Pal at none against 曲尺's shown. Due Pal also leads on update cadence (every 2 weeks vs every 6 weeks) and device support (3 vs 1). On price, in-app purchases and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
曲尺 ships an update every 6 weeks, Due Pal every 2 weeks. The most recent releases landed on October 5, 2026 and October 21, 2026 respectively.
| Parameter | 曲尺 | Due Pal |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 90.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 6 weeks | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone | iPhone, iPad, Apple Watch — better |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 5 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Masayuki Sato | 帅 陈 |
In-app purchases
曲尺
No in-app purchases
Due Pal
No in-app purchases









