Dual vs DOTHING
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Dual
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Dual-Calculator lets you run two calculations side by side, compare results, and work more efficiently. With a clean, intuitive interface, itβs ideal for students, professionals, and everyday calculations.
DOTHING
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Managing tasks isn't doing tasks. Most to-do apps ask you to build a system first. Projects, tags, folders, priorities, filters. You spend Sunday setting it up and abandon it by Thursday. DOTHING has none of that. You add a task. It shows up on the day it's due. You tap it done. Say it or type it Hold the + button and talk. "Call Mom tomorrow at 6" becomes a task, dated, without you touching a date picker. Transcription happens on your iPhone. Block what pulls you away Choose the apps that distract you, then press and hold to block them while you work on a task. A timer on your Lock Screen and in the Dynamic Island keeps you company until it's done. Do it together Share a task with anyone. Everyone sees the same steps and every change as it happens. Joining is free. Everything a task needs Subtasks to break it into steps. Notes, links, photos, files and drawings. Repeats for the things that come back. Reminders that arrive on time. Just ask Siri "Add a task in DOTHING." "What's on today in DOTHING?" "What's coming up in DOTHING?" Your tasks show up when you search your iPhone, too. Everywhere you already look Widgets on your Home Screen and Lock Screen. StandBy on your nightstand. Yours alone No account. No sign-up. No tracking. Your tasks sync through your own iCloud and go nowhere else, unless you share them. Free, with Pro when you need more DOTHING is free for up to 5 tasks at a time, each with up to 3 subtasks. Finish one and its place opens up. Tasks shared with you don't count. DOTHING Pro removes every limit: monthly, yearly with the first week free, or once for life. Yearly and Lifetime also come as Family plans for up to 6 people through Family Sharing. Subscriptions renew automatically unless cancelled at least 24 hours before the period ends. Manage or cancel them anytime in your Apple Account settings. Terms of Use: https://premgurusamy.github.io/dothing/ Privacy Policy: https://premgurusamy.github.io/dothing/privacy.html
Screenshots
Verdict
The clearest difference is in-app purchases: Dual at none against DOTHING's 1. Dual also leads on iOS requirement (17.0 vs 26.0). DOTHING's advantage is update cadence (every 2 months vs every 28 months). On price, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. DOTHING sells 1 one-off in-app purchase. Dual asks for nothing beyond the download.
Dual ships an update every 28 months, DOTHING every 2 months. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.
| Parameter | Dual | DOTHING |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 28 months | Every 2 months β better |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPad β better | iPhone |
| Requires iOS | 17.0 β better | 26.0 |
| Further details β not scored | ||
| Size | 4 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Chih-Hao Chen | Prem Gurusamy |
In-app purchases
Dual
No in-app purchases
DOTHING
- Lifetime Access$49.99









