WebDuo Pro vs Tree Notebook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WebDuo Pro
Browse two websites simultaneously, side-by-side, on your iOS device. Enhance productivity by viewing multiple web pages at once. On compatible iPads, you can even view three browsers using multitasking.
- Browse two websites simultaneously
- Side-by-side web viewing
- Supports any iOS device
- Triple browser on compatible iPads
- Multitasking integration
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WebDuo is the only app that allows you to browse two websites at the same time (side by side) on any iOS device. Take WebDuo Pro for a spin and let us know what you think! P.S. Get THREE browsers side by side by side if you have the iPad Air 2 , iPad Mini 4, iPad Pro by using multitasking!!
Tree Notebook
Organize personal information with a hierarchical notes manager. Structure data into a tree-like hierarchy of folders and notes, with options for public and encrypted private sections. Features include powerful search, customizable item appearance, and event reminders.
- Tree-like hierarchical organization
- Public and encrypted private data sections
- Attachments (images, files)
- Multiple data views (tree, list, favorites, history)
- Powerful search capabilities
- Customizable item appearance
- Event reminders and calendar
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Tree Notebook is a hierarchical notes manager designed for keeping personal information. Tree Notebook runs on an iOS device (iPhone or iPad). Besides, there is a counterpart for OS Windows which can be synchronized with up to three iOS devices via a local Wi-Fi network. No access to Internet is needed for synchronizing. The data in Tree Notebook is divided in two parts: the public part accessible without password and the encrypted private part which requires password for opening. The data in every part is arranged as a tree-like multilevel hierarchy of folders and notes. Any folder can include notes and other folders, and so fourth. Any item (a note or a folder) can include text of any size. The items can keep attachments like images or other files. The app can represent data in several ways: as a tree, as a list of items (folders and notes) on the current level, as a list of manually selected items ("Favorites"), or the items visited recently ("History"). The contents of an individual item can be viewed or edited. Tree Notebook includes powerful search facilities: simplified or conditional global search, local search inside an item text. The items can be sorted by several criteria: alphabetically, by creation or modification time, and in manually defined order. The item titles can be attributed using a variety of font types, colored flags, graphic icons. Any item can have an Event attribute and serve as an alarm clock or reminder. A calendar feature is available to help managing events. The app is free to use both on iOS devices and desktop PC.
Screenshots
Verdict
The clearest difference is price: Tree Notebook at Free against WebDuo Pro's $1.99. WebDuo Pro's advantage is update cadence (every 5 weeks vs every 25 months) and ratings volume (77 vs 5). On rating, ads, in-app purchases and monetization model 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
Tree Notebook is free to download; WebDuo Pro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.4 for WebDuo Pro against 4.4 for Tree Notebook. That said, the two scores are not equally well evidenced: WebDuo Pro has 77 ratings behind it against 5, so its average is the more settled of the two.
WebDuo Pro ships an update every 5 weeks, Tree Notebook every 25 months. The most recent releases landed on September 23, 2026 and September 12, 2026 respectively.
| Parameter | WebDuo Pro | Tree Notebook |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.4 (77 ratings) | 4.4 (5 ratings) |
| Positive reviews | 58.6% of reviews | — |
| Number of ratings | 77 — better | 5 |
| Update frequency | Every 5 weeks — better | Every 25 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 18 MB | 12 MB |
| Age rating | 17+ | 4+ |
| Developer | Michael Sacks | Elena Pankratova |
Customer experience
WebDuo Pro
Tree Notebook
In-app purchases
WebDuo Pro
No in-app purchases
Tree Notebook
No in-app purchases








