Whack vs cryptoscreen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Whack
This game makes math practice engaging and challenging. As you tap numbers, the game speeds up, turning your math drills into an alert and focused experience. It's designed for those who enjoy a high-difficulty approach to learning.
- Engaging math practice
- Increasing difficulty
- Focus enhancement
- Game-like interface
- Quick reaction challenges
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Math can be hard, and staying focused on math can be even harder. Whack-A-Num exists to keep you awake and alert during hours of math practice. With every number tapped, the bubbles move faster. The calculator for people who play video games on Hard Mode.
cryptoscreen
This app creates secure, self-destructing notes that are encrypted locally before being shared. Both a link and a PIN are required to access the message, which is then deleted after a single successful read. It offers enhanced privacy features like screenshot detection.
- Local encryption before upload
- Link and PIN required for access
- One-time read deletion
- Screenshot detection
- Message destruction after failed PIN attempts
- Link expiration
- Encrypted image attachments (Pro)
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cryptoscreen is a private note app for messages that should not last. Write a note, choose a six-digit PIN, and cryptoscreen encrypts the message on your iPhone before it leaves the device. Share the generated link and send the PIN separately. The recipient can read it once in the iOS app, with an App Clip, or in a web browser when you allow web reading. No app download is needed for browser reading. CHOOSE HOW YOUR MESSAGE CAN BE READ Allow app and web reading for easier sharing, or choose app-only reading. Both the link and the PIN are required. Web-enabled messages are decrypted in the recipient's browser and become unavailable for another read after they are opened. ONE-TIME MESSAGES - Encrypt notes locally before upload. - Open normal messages once, then make them unavailable to other readers. - Destroy a message after the third wrong PIN attempt. - Let unopened links expire after the retention window. - Check availability in Sent Messages, including messages opened on the web. GUARDED READING ON iOS The iOS app and App Clip use a guarded reader to reduce casual screen exposure. The reader clears when iOS reports a screenshot. Screenshot protection is best-effort: iOS reports normal screenshots after capture. Browsers cannot provide the app's screenshot detection or capture protection, and no app can protect against external cameras or compromised devices. TEXT IS FREE. IMAGE SENDING IS PRO. Send text-only messages and read received text and images for free. Pro lets senders attach encrypted images. Restore purchases and manage your subscription from Settings. cryptoscreen does not require accounts, profiles, or contact lists. Messages are encrypted before upload; the service stores encrypted content and the metadata needed for expiry, PIN attempts, and message availability. Optional interaction-status sharing is off by default. Support: https://cryptoscreen.app/support Privacy Policy: https://cryptoscreen.app/privacy
Screenshots
Verdict
The clearest difference is update cadence: Whack at every 3 days against cryptoscreen's every 2 months. On price, rating, review sentiment and ratings volume 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.
On the App Store both sit at effectively the same score — 5.0 for Whack against 5.0 for cryptoscreen. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Whack ships an update every 3 days, cryptoscreen every 2 months. The most recent releases landed on October 3, 2026 and October 1, 2026 respectively.
| Parameter | Whack | cryptoscreen |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 3 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone |
| Requires iOS | 16.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 0 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Danielle Lewis | Domenico Marco Di Donna |
Customer experience
Whack
cryptoscreen
In-app purchases
Whack
No in-app purchases
cryptoscreen
No in-app purchases
