Comparison

Habit Tracker vs Duet

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Habit Tracker

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Leo is the habit tracker that respects your time and money. Build real habits with a beautifully designed app that doesn't manipulate you. No paywalls. No subscriptions. No dark patterns. Just honest habit tracking. WHAT YOU GET Unlimited habits (no gatekeeping) Beautiful calendar heatmaps Streak tracking & insights Custom colors, icons, reminders Add notes to every completion Weekly analytics & progress Full data export Dark mode support WHY LEO IS DIFFERENT Most habit apps are free, then hit you with paywalls. Leo is 100% freeβ€”no catch. Everything is included from day one. No surprise charges. No features locked behind tiers. No trial that expires. Just a free app, all features, forever. THE LEO WAY Track your meditation streak. Watch your exercise consistency. See patterns emerge. Build momentum. No notifications nagging you. No badges trying to manipulate you. Just a clean, calm app that helps you become who you want to be. Download Leo. It's free. Build for life. PRIVACY Your habit data stays on your phone. We don't sell it, track it, or share it. Period. Made with care by a developer who uses it every day.

About

Duet

Features
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Read closed. Think open. Duet is a PDF reader for people who need to make sense of what they read. Highlight a passage and it becomes a card on a Canvas beside the page. Group your cards, connect them, add notes and questions, and work out what you think. Leave and come back later, and you're on the line you left. Now on iPhone, iPad and iPhone Duo. FREE TO START Your first two PDFs are free, each with its Canvas, Apple Pencil, private AI and the iPhone Duo layouts. No trial clock and no account. DUET PRO One purchase unlocks: β€’ Unlimited PDFs, each with its own Canvas β€’ All six themes β€’ Home Screen and Lock Screen widgets Pay once and keep it. No subscription. Pro works on every iPhone, iPad and iPhone Duo signed in to the same Apple Account. THE CANVAS Every highlight arrives as a card, linked to its page. On the Canvas you can: β€’ Clip passages straight from your PDF β€’ Add sticky notes and text β€’ Group and connect ideas with shapes and arrows β€’ Lay out numbers in tables β€’ Add photos from your library β€’ Draw with your finger, or with Apple Pencil on iPad β€’ Record voice notes, transcribed on your device so you can search them PRIVATE AI Ask about a passage, a card or a group of cards, and pin the answer to your Canvas. Answers come from your document and show the pages they came from. Duet uses Apple Intelligence on your device, so it works without internet, even on a flight, and your document stays with you. For bigger questions across a whole report, you can let Duet use Apple's Private Cloud Compute in Settings. It's only used when you're online. AI features need a device that supports Apple Intelligence. ON IPHONE DUO Read with the phone closed. Open it, and the page and its Canvas sit side by side. Half-folded like a book or flat on a table, the layout changes and every feature stays. Close it and you're back on the line you left. ON IPAD AND IPHONE iPad gives the Canvas the most room. Write and draw with Apple Pencil, and use Scribble to turn handwriting into text. On iPhone, the page and its Canvas are one tap apart. On iPad and iPhone Duo, open two reports side by side in Split View. WIDGETS (DUET PRO) For your Home Screen and Lock Screen: β€’ Continue Reading opens the line you left. The larger sizes show your latest highlights too. β€’ Recents shows your latest documents. β€’ Latest Highlights shows recent passages from all your PDFs. SIX THEMES Ink & Paper is free. Studio Green, Studio Black, Tapestry, Cyanotype and Dawn come with Duet Pro. Each one changes the background, cards, highlight colour and app icon. YOUR LIBRARY Each PDF shows its page count and how many highlights you've made. Import from Files, Mail and Safari. Free to download. Duet Pro is a one-time in-app purchase. No subscription, no account, no ads. If anything's unclear, or something isn't working, get in touch: deepanshi@consciousengines.com Privacy Policy: https://duetreader.app/privacy Terms of Use: https://duetreader.app/terms

Screenshots

Habit Tracker3 screens
Duet4 screens

Verdict

The call

The clearest difference is in-app purchases: Habit Tracker at none against Duet's 1. On price, update cadence, 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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Duet sells 1 one-off in-app purchase. Habit Tracker asks for nothing beyond the download.

UpkeepUpdate frequency

Habit Tracker ships an update every 6 days, Duet every 10 days. The most recent releases landed on November 6, 2026 and November 10, 2026 respectively.

Scorecard1 real difference Β· 5 level
Habit Tracker versus Duet: the parameters behind the verdict, then further details
ParameterHabit TrackerDuet
PriceFreeFree
Update frequencyEvery 6 days β€” betterEvery 10 days
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.5 β€” better27.0
Further details β€” not scored
Size4 MB31 MB
Age rating4+4+
DeveloperKushal PatelConscious Engines

In-app purchases

None

Habit Tracker

No in-app purchases

1 purchases

Duet

One-time1
  • Duet Pro Lifetime$9.99

Questions

Is Habit Tracker free?
Habit Tracker is free to download, with no in-app purchases.
Is Duet free?
Duet is free to download, with in-app purchases available.
Do Habit Tracker or Duet have ads?
Neither Habit Tracker nor Duet shows ads.
Which is updated more often, Habit Tracker or Duet?
Habit Tracker ships an update every 6 days, and Duet every 10 days. Most recently, Habit Tracker was updated on November 6, 2026 and Duet on November 10, 2026.

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