Card Decks vs Crypto Notes
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Card Decks
Create and share custom card decks for various uses, from team meetings and planning to personal expression and task management. Configure individual cards with display times for timers or reminders, and easily share decks via email or messages.
- Configurable colored text cards
- Group cards into decks
- Create custom card sets
- Timer and countdown functionality
- Share decks via email/messages
- Open source
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Card Decks is a small utility application for your iPhone and iPad which brings you simple, configurable, colored, multi-line text cards that are grouped into card decks. A card deck can be used to show your vote or estimation on a certain topic in a meeting, e.g. in a planning meeting used in agile software development methods like Scrum or Extreme Programming. If the pre-configured cards don't fit your needs, just extend the existing cards or build your own set of cards, e.g. including special estimation numbers like "Pi" or "?". Or, if you are the chair of a session on a conference, you can use a card deck to remind a speaker of the remaining time for the presentation. Or, as a speaker, use a timer card deck to track the remaining minutes. Or, just use your cards to show your opinion, argument, or mood, in a simple, non-verbal way. Or, use the shuffle feature to randomly select a task from a card deck with tasks, or randomly assign tasks to students, team members, etc. Card Decks contains some pre-configured card decks with voting cards, simple colored cards, cards with numbers, colored cards which show remaining minutes, and some timers. Individual card decks can be created with the built-in editor. Each card in a card deck can be configured with a display time. This way, you can build your own countdown timer with individual numbers, texts, reminders, etc. Example timers for 15 and 60 minutes are pre-configured. Additionally, Card Decks supports sending and receiving card decks via e-mail, messages, etc. for sharing your card decks with your friends or colleagues. Either as an URL, or via a JSON-based document. Found a bug? Missing a feature? Drop a line to carddecks@0xc0.de, or open an issue in the project on GitHub. Card Decks is open source and licensed under the terms of the MIT license. Its source code is hosted on GitHub.
Crypto Notes
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The goal of the Crypto Notes app is to create the most secure note-taking application. Without the password, no one can access or modify your notes. We use an encryption method that is very close to information-theoretic security, providing a level of security equivalent to it in most typical scenarios. The password is the only way to access your notes. If you forget it, the content of your notes will be permanently lost. Therefore, please make sure to remember your password carefully and avoid setting one that is too simple, to prevent others from guessing it through brute force attacks. Notes are encrypted and stored locally, not on the server. You can back them up via iCloud.
Screenshots
Verdict
The clearest difference is update cadence: Crypto Notes at every 11 days against Card Decks's every 5 months. 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.
Card Decks ships an update every 5 months, Crypto Notes every 11 days. The most recent releases landed on October 3, 2026 and October 4, 2026 respectively.
| Parameter | Card Decks | Crypto Notes |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) — better | — |
| Positive reviews | 77.8% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 5 months | Every 11 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 18.0 | 17.6 — better |
| Further details — not scored | ||
| Size | 1 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Arne Harren | 帅 邵 |
In-app purchases
Card Decks
No in-app purchases
Crypto Notes
No in-app purchases









