Captcha Stash
For privacy-conscious individuals seeking a secure, offline environment for storing sensitive notes and private data.
Overview · Full Intel report in progress
Captcha Stash is an established entertainment app that is completely free.
What is Captcha Stash?
Current Momentum
v1.2
What's New in Version 1.2 Rich Note Types CaptchaStash now stores more than just text. In addition to text notes, you can now save photos, videos, audio recordings, and documents — all protected by the same AES-256-GCM encryption as your text notes. Audio can be recorded directly in the app; photos and videos are imported from your library without requiring permanent photo access; documents can be imported from Files and shared or exported via the system share sheet. 7 New CAPTCHA Challenges Version 1.2 adds seven new CAPTCHA types, bringing the total to eleven: - Emoji Sequence — tap emojis in the correct order - Counting — count objects in a grid - Odd One Out — spot the item that doesn't belong - Word Arithmetic — solve simple word-based math - Analogy — complete the pattern - Clock Reading — read an analogue clock face - Memory — memorise and recall a sequence You can preview and try all 11 types from the Settings screen. Optional Biometric Second Factor Turn on Face ID or Touch ID as a second unlock step in Settings. After a correct CAPTCHA, the app can require a biometric confirmation before granting access — adding a hardware-backed layer of security. Settings explains the trade-offs clearly so you can decide what's right for you. Security Hardening This release brings a full security audit's worth of improvements: - Encryption keys now require the device passcode to be set; they are never backed up to iCloud - Attachments are excluded from iCloud backup and iCloud Keychain sync - The vault re-locks automatically whenever the app leaves the foreground - Failed CAPTCHA attempts now trigger exponential backoff (5 s → 15 s → 30 s → 60 s), and the lockout timer persists across app restarts — force-quitting doesn't reset it - All temporary files are written with Complete File Protection - A confirmation alert is shown before any file is sent to the share sheet About Screen Tap the ⓘ button on the unlock screen to open a full in-app reference covering note types, all CAPTCHA challenges, and a plain-language explanation of CaptchaStash's security architecture.
Competition
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What makes this app unique?
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What Are The Key Features?
Protects notes using visual, math, word, or pattern-based CAPTCHA challenges to prevent bot access.
Ensures all encrypted data remains stored locally on the user's device with no cloud uploads.
Automatically wipes all stored notes after a user-configured number of failed access attempts.
Operates without user accounts, analytics, or data tracking.
How much does it cost?
Who Built It?
Alastair Bor
Equipping creative professionals and privacy-conscious users with high-fidelity technical utilities and retro-aesthetic tools.
Portfolio
12
Apps
What other apps does Alastair Bor make?
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Portfolio breakdown, audience, momentum, and every app published by Alastair Bor.
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What do users think recently?
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What is the competitive landscape for Captcha Stash?
How's The Entertainment Market?
Market outlook for this category
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SWOT, key takeaways & outlook
The outtake for Captcha Stash
Key Takeaways
Captcha Stash differentiates itself by using CAPTCHA-based gatekeeping to secure locally-stored, private notes.
Where Is It Heading?
Trend analysis
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