Comparison

TwoUp Split Screen Dual Window vs Duo Viewer

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

Head to head
About

TwoUp Split Screen Dual Window

Features
Read full description

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 โ€” 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 โ€” WITH PRO 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, and no server of ours. Your notes, your documents and your saved sites never leave the device โ€” there is nowhere for them to go. The app asks for no permissions at all: no camera, no photos, no contacts, no location. The app sends anonymous usage statistics so we can see which screens people reach and where they get stuck. None of your content is ever included โ€” not your notes, not the addresses you open. You can switch it off in Menu > App > Share usage data. TwoUp Pro adds two things: keeping more than one saved workspace, and saving your own sites as shortcuts. Terms of Use: https://nikolaykutsbr.github.io/twoup-support/terms.html Privacy Policy: https://nikolaykutsbr.github.io/twoup-support/privacy-policy.html

About

Duo Viewer

Read full description

Make room for two with Duo Viewer, a split-screen browser and file viewer for iPhone. YOUR FAVOURITE WEB APPS, TOGETHER Open two websites on one screen. Compare pages, browse social feeds alongside online video, or keep a reference page within view. Drag the divider to adjust your workspace, minimise a pane when you need more room, and turn your iPhone for a landscape layout. FILES BESIDE THE WEB Import files from the Files app and organise them in Duo Viewer. View PDFs, supported Office and iWork documents, images, text, audio, and video alongside a website or another file. MAKE IT YOUR WORKSPACE โ€ข Browse websites in two panes โ€ข Save bookmarks and revisit recent addresses โ€ข Open links in the other pane โ€ข Resize panes and use portrait or landscape mode โ€ข Import, view, rename, and delete supported files โ€ข Resume your saved workspace

Screenshots

TwoUp Split Screen Dual Window4 screens
Duo Viewer4 screens

Verdict

The call

The clearest difference is iOS requirement: TwoUp Split Screen Dual Window at 18.0 against Duo Viewer's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. TwoUp Split Screen Dual Window sells 2 in-app purchases, starting at $6.99 per 7 days and Duo Viewer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference ยท 5 level
TwoUp Split Screen Dual Window versus Duo Viewer: the parameters behind the verdict, then further details
ParameterTwoUp Split Screen Dual WindowDuo Viewer
PriceFreeFree
Update frequencyWeeklyโ€”
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone
Requires iOS18.0 โ€” better26.0
Further details โ€” not scored
Size4 MB2 MB
Age rating17+17+
DeveloperMikalai KutsLiangjun Song

In-app purchases

2 purchases

TwoUp Split Screen Dual Window

Subscriptions2
  • TwoUp Plus Week3 Days trial$6.997 Days
  • TwoUP Plus Year$59.991 Year
1 purchases

Duo Viewer

One-time1
  • Duo Viewer Pro$6.99

Questions

Is TwoUp Split Screen Dual Window free?
TwoUp Split Screen Dual Window is free to download, with in-app purchases available.
Is Duo Viewer free?
Duo Viewer is free to download, with in-app purchases available.
Do TwoUp Split Screen Dual Window or Duo Viewer have ads?
Neither TwoUp Split Screen Dual Window nor Duo Viewer shows ads.

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