# Duo: Split Screen Dual Window — Multitask Two Apps: Web & PDF

> Multitask Two Apps: Web & PDF (iPhone/iPad app by Mikalai Kuts.)

- Source: https://appshunter.io/ios/app/duo-split-screen-dual-window/id6802056782 (this page in markdown: same URL + `.md`)
- Developer: [Mikalai Kuts](https://appshunter.io/developer/1757613729)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Age rating: 17+
- Requires: iOS 18.0 · 2 MB
- Languages: American English
- Released: 2026-09-08
- Data updated: 2026-09-11
- User reviews in markdown: https://appshunter.io/ios/app/duo-split-screen-dual-window/id6802056782/reviews.md

## What is Duo?

TwoUp puts two things on one iPhone screen at the same time: a web page, a PDF and a
plain-text note, in any combination you need.

Read a PDF above and write your notes below. Keep a reference page open beside the
document you are working through. Both panes stay live — scroll one and the other keeps
its place.

SAVE THE PAIR
A pair of panes is a workspace. Name it, and it reopens exactly as you left it: the same
document, the same page, the same note text, the same divider position.

MADE FOR READING
Drag the divider to give either pane more room, or send one pane full screen and back.
Turn the phone sideways and a PDF opens as a two-page spread, like a book, with your note
still beside it.

YOUR OWN SITES
Save the pages you keep coming back to, with their titles and icons, and open one into a
pane without typing an address.

IT ALL STAYS ON YOUR PHONE
No account, no sign-in, no server. Your notes, your documents and your saved sites never
leave the device — there is nowhere for them to go. The app asks for no permissions at
all: no camera, no photos, no contacts, no location.

TwoUp Pro adds one thing: keeping more than one saved workspace.

Terms of Use: https://nikolaykutsbr.github.io/twoup-support/terms.html
Privacy Policy: https://nikolaykutsbr.github.io/twoup-support/privacy-policy.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| TwoUp Plus Week | $6.99 | per 7 days |
| TwoUP Plus Year | $59.99 | per year |



## Version history (last 2 releases)

### 1.1 — 2026-09-10

A redesigned upgrade screen: the two plans, what each costs and what they unlock now sit on one screen without scrolling, and the terms are next to the button rather than below the fold.

Split screen rebuilt. The two panes re-lay themselves out when the display area changes size or proportion, keeping their content and scroll position. The divider is easier to grab, full screen and back is immediate, and in landscape a PDF fills the available room as a two-page spread with the note beside it.

Saved workspaces still reopen exactly as you left them.

### 1.0 — 2026-09-08

No release notes.

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*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 2026-09-11.*