CoralUp vs Zettel
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CoralUp
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Take Control of Your Day and Make a Difference for Our Oceans! CoralUp combines the proven power of timeboxing with a fun, eco-friendly twist. Plan your tasks, manage your time, and earn virtual coins that help you adopt real coral and restore marine habitats around the globe! Stay Organized with Timeboxing - Add Tasks Easily: Write down everything you need to do—big or small—and keep your to-dos in one convenient place. - Rank Your Priorities: Assign a rank to each task (1 = highest priority) so you always know what to tackle first. - Schedule with Precision: Plan specific time blocks for every task. Stay focused and watch your productivity soar! Get Motivated with Gamification - Earn Coins for Completing Tasks: Stick to your schedule and build good habits to collect in-app coins. - Build Your Virtual Reef: Use coins to restore and customize your own virtual seafloor—watch it come to life with coral, fish, and more! - Real-World Impact: Redeem coins to adopt a real coral. By doing so, you help fund coral conservation and protect our underwater ecosystems. Why CoralUp? - Boost Productivity: Timeboxing forces you to concentrate on one task at a time, reducing procrastination and increasing efficiency. - Positive Reinforcement: Receiving coins for completed tasks keeps you motivated and makes tackling your to-do list feel like a fun challenge. - Eco-Friendly Mission: Feel great knowing your daily efforts contribute to the preservation of precious marine life and coral reefs. Join the CoralUp Community - Track Your Progress: Watch your daily, weekly, and monthly stats improve as you conquer tasks faster and more effectively. - Compete with Friends: Challenge friends to complete tasks, rack up coins, and see who can grow the most impressive virtual reef! - Share Your Impact: Show off your real coral adoption certificates to encourage others to join the cause. Download CoralUp Today and transform your daily routine into a win-win for both you and our planet!
Zettel
This app offers a minimalist note-taking experience, focusing on a single, full-screen note at a time. It features a unique swipe-to-clear gesture with haptic feedback and simple tag functionality for easy organization. Notes are saved as plain Markdown files for versatile use.
- Single full-screen note interface
- Swipe-to-clear gesture with haptic feedback
- Simple hashtag tagging system
- Plain Markdown file export
- Works with Files app
- Dark mode support
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Zettel - Quick Notes for iOS. Write. Swipe to tear. Done. Zettel brings the satisfying feeling of ripping paper to your iPhone. What makes it different: - One note at a time: Full screen. No tabs, no folders, no mess. Just you and your thoughts. - Tear to clear: Swipe from the edge and drag across the screen. Your note tears away with haptic feedback that actually feels real. - Tags that work: Type #anything and it becomes a tag. Find notes instantly without setting up complicated systems. - Your files, anywhere: Notes are plain Markdown files. Edit them in other apps, sync however you want, or just keep them local. Perfect for: - Quick thoughts - Meeting notes - Daily journaling - Project ideas Simple by design: - iPhone only (as it should be) - Works with Files app - Dark mode included - No account required - Zero tracking Built by someone who got tired of overcomplicated note apps. Sometimes the best tools are the simplest ones.
Screenshots
Verdict
The clearest difference is price: CoralUp at Free against Zettel's $2.99. CoralUp also leads on update cadence (every 5 days vs monthly) and iOS requirement (13.0 vs 26.0). Zettel's advantage is ads (none vs shown). On 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
CoralUp is free to download; Zettel costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
CoralUp ships an update every 5 days, Zettel monthly. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.
| Parameter | CoralUp | Zettel |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | — | 4.8 (6 ratings) — better |
| Positive reviews | — | 88.9% of reviews |
| Number of ratings | — | 6 — better |
| Update frequency | Every 5 days — better | Monthly |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, Mac |
| Requires iOS | 13.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 62 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Simon Hertweck | Alexander Moritz Weichart |
In-app purchases
CoralUp
No in-app purchases
Zettel
No in-app purchases









