Red PDF Reader vs Karbywarby Todo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Red PDF Reader
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Red PDF Reader A clean, distraction-free PDF reader designed for people who actually read. Open any PDF from your Files app and pick up exactly where you left off — Red PDF Reader remembers your last page automatically and syncs it across all your devices via iCloud. Switch from your iPhone to your iPad and continue reading without missing a beat. Features: Continuous reading — smooth, vertical scroll layout optimized for long documents Auto-resume — your last page is saved automatically and synced across devices Recent files — quickly jump back to any of your last 50 documents Page thumbnails — visual panel for fast navigation through any document Go to page — jump directly to any page with a single tap Page indicator — always know where you are with a subtle page counter overlay No sign-in required. No subscriptions. No ads. Just your PDFs, exactly where you left them.
Karbywarby Todo
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Most task apps end up costing more time than they save. You maintain lists, sort categories, push due dates around. Doing everything except the task itself. Plenty of people have given up on todo apps for exactly that reason. This one is for them. Karbywarby Todo shows what matters next instead of the whole list. Reduced, but not bare. The measure is the feeling of getting something fully off your plate with little effort. THE APP DOES THE UPKEEP The work other apps hand to you, Karbywarby Todo does itself: • Overdue tasks get rescheduled, not flagged. No growing pile of red staring at you every morning. • Date suggestions work from your real week. From what you actually finished over the last 30 days, not from what you meant to. • A suggestion for what to tackle next, without you having to sort anything. An AI does that work in the background. The AI features are free to use, with a daily cap. What it suggests stays a suggestion. You decide. ALSO IN YOUR BROWSER todo.karbywarby.com, same account. Add it to your home screen on mobile and it behaves like an app. Free and ad-free.
Screenshots
Verdict
The clearest difference is update cadence: Karbywarby Todo at every 6 days against Red PDF Reader's every 3 months. Karbywarby Todo also leads on iOS requirement (15.0 vs 18). On price, ads, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Red PDF Reader ships an update every 3 months, Karbywarby Todo every 6 days. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.
| Parameter | Red PDF Reader | Karbywarby Todo |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18 | 15.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Khurshed Gulov | Lars Patzold |
In-app purchases
Red PDF Reader
No in-app purchases
Karbywarby Todo
No in-app purchases
Questions
Is Red PDF Reader free?
Is Karbywarby Todo free?
Do Red PDF Reader or Karbywarby Todo have ads?
Which is updated more often, Red PDF Reader or Karbywarby Todo?
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