Comparison

Dark Mode Reader vs DuoSub

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

Head to head
About

Dark Mode Reader

Features
Read full description

DarkMode lets you restyle the web in Safari β€” give every website the look you love with curated themes, custom fonts, and comfortable spacing. WHY DARKMODE β€’ Beautiful, hand-crafted themes β€” light and dark β€’ Easy on the eyes for late-night reading β€’ Works on (almost) any website β€’ No accounts, no tracking FEATURES β€’ 9+ curated color themes β€’ Custom fonts and adjustable line & letter spacing β€’ One setup β€” your theme applies to every website automatically β€’ Global on/off master switch β€’ Floating auto-scroll button for hands-free reading β€’ iCloud sync β€” your themes follow you across iPhone and iPad HOW IT WORKS 1. Open Settings β–Έ Apps β–Έ Safari β–Έ Extensions 2. Turn on β€œDarkMode” and allow it on every website 3. Pick a theme β€” the web updates instantly DarkMode is built with privacy in mind. It doesn’t collect your data or track your browsing. Some themes and fonts are part of DarkMode Pro, a one-time purchase that unlocks everything β€” no subscription.

About

DuoSub

Features
Read full description

Watch YouTube in two languages at once. DuoSub plays a video with two subtitle lines: the original line, and your own language right underneath it. Nothing to download, no subtitle files to hunt for, no settings to fight with. HOW IT WORKS 1. Bring in a video β€” paste a link, share it from the YouTube app, or find it in the built-in Browse tab. 2. Choose the language for the second line. 3. Press play. Both lines run with the video, word by word. WHAT YOU GET β€’ Dual subtitles β€” the original on top, your translation below, always in sync. β€’ 90 languages for the translated line, from Vietnamese, Spanish and Japanese to Arabic, Hindi and Ukrainian. β€’ Karaoke highlighting that frames the word being spoken, so you never lose your place. β€’ A full transcript that scrolls along with the video β€” tap any line to jump to that moment. β€’ Your subtitles, your way: text size, a colour for each line, karaoke on or off β€” adjustable without leaving fullscreen. β€’ A real player: drag the seek bar, tap to pause, swipe for brightness and volume, hold for 2x, lock the screen. β€’ A library that keeps every video you add, with its subtitles saved on your device so replays start instantly. β€’ The app itself in 12 languages, switchable any time without a restart. WHO IT'S FOR People learning a language from real videos instead of textbook audio. Listeners who want an hour-long podcast to stop being a wall of sound. Students following courses recorded in another language. Anyone reading foreign news and documentaries as they play. DUOSUB PRO Free: translate up to 3 new videos a day. Videos that have already been translated open for free and don't use up your daily count. Pro: unlimited translation, every language, every day. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://duosub-1ae27.web.app/privacy GOOD TO KNOW DuoSub works with videos that have captions available. Videos play through YouTube's own player β€” DuoSub does not download or store video. DuoSub is an independent app and is not affiliated with, endorsed by or sponsored by YouTube or Google.

Screenshots

Dark Mode Reader4 screens
DuoSub4 screens

Verdict

The call

The clearest difference is ads: Dark Mode Reader at none against DuoSub's shown. On price, update cadence, in-app purchases 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. Dark Mode Reader sells 1 one-off in-app purchase and DuoSub sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Dark Mode Reader ships an update every 2 months, DuoSub monthly. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

Scorecard1 real difference Β· 5 level
Dark Mode Reader versus DuoSub: the parameters behind the verdict, then further details
ParameterDark Mode ReaderDuoSub
PriceFreeFree
Update frequencyEvery 2 monthsMonthly β€” better
AdsNo β€” betterYes
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details β€” not scored
Size5 MB12 MB
Age rating4+17+
DeveloperDang Nam NguyenVui Nguyen

In-app purchases

1 purchases

Dark Mode Reader

One-time1
  • Lifetime$3.99
3 purchases

DuoSub

Subscriptions3
  • DuoSub Pro - 1 Month$6.991 Month
  • DuoSub Pro - 3 Months$14.993 Months
  • DuoSub Pro - 1 Year$49.991 Year

Questions

Is Dark Mode Reader free?
Dark Mode Reader is free to download, with in-app purchases available.
Is DuoSub free?
DuoSub is free to download, with in-app purchases available.
Do Dark Mode Reader or DuoSub have ads?
DuoSub shows ads; Dark Mode Reader does not.
Which is updated more often, Dark Mode Reader or DuoSub?
Dark Mode Reader ships an update every 2 months, and DuoSub monthly. Most recently, Dark Mode Reader was updated on October 31, 2026 and DuoSub on November 6, 2026.

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