Dark Mode Reader vs DuoSub
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Dark Mode Reader
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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 βΈ Apps βΈ Safari βΈ Extensions 2. Turn on βDarkModeβ and allow it on every website 3. Pick a theme β the web updates instantly DarkMode is built with privacy in mind. It doesnβt 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.
DuoSub
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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
Verdict
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
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.
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.
| Parameter | Dark Mode Reader | DuoSub |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Monthly β better |
| Ads | No β better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details β not scored | ||
| Size | 5 MB | 12 MB |
| Age rating | 4+ | 17+ |
| Developer | Dang Nam Nguyen | Vui Nguyen |
In-app purchases
Dark Mode Reader
- Lifetime$3.99
DuoSub
- DuoSub Pro - 1 Month$6.991 Month
- DuoSub Pro - 3 Months$14.993 Months
- DuoSub Pro - 1 Year$49.991 Year









