# Captcha Stash — Keep your secrets safe from AI > Keep your secrets safe from AI (iPhone/iPad app by Alastair Bor.) - Source: https://appshunter.io/ios/app/captcha-stash/id6749536677 (this page in markdown: same URL + `.md`) - Developer: [Alastair Bor](https://appshunter.io/developer/1824969204) - Category: Entertainment, Utilities - Price: Free - Age rating: 4+ - Requires: iOS 15.6 · 5 MB - Languages: American English - Released: 2025-08-11 - Data updated: 2026-08-01 - User reviews in markdown: https://appshunter.io/ios/app/captcha-stash/id6749536677/reviews.md ## What is Captcha Stash? Captcha Stash – The Human-Only Vault Captcha Stash is a next-generation vault that ensures only humans can access sensitive notes and private information. Whether you're storing personal thoughts, confidential data, or secret plans, this app keeps everything locked down behind a human-only barrier: CAPTCHA verification. KEY FEATURES Human-Only Authentication Choose from visual, math, word, or pattern-based CAPTCHA challenges. Bots and AI can't get through — only a real person can. On-Device Storage All your data stays on your device. Notes are encrypted and stored locally. Nothing is uploaded. Ever. Self-Destruct After Failed Attempts Configure the number of failed access attempts. If someone fails too many times, all notes are wiped for your security. Secure and Private No user accounts. No cloud backups. No analytics. Captcha Stash doesn’t track you, log you, or sell your data. Minimal Note Interface Jot down ideas, passwords, thoughts, or sensitive information in a clean, distraction-free environment. Customizable CAPTCHA Modes You decide how to verify access: tap colored shapes, solve simple equations, unscramble words, or complete sequences. All processed locally. Fully Offline and Ad-Free Works entirely offline. No ads. No internet connection needed to use the app or access your data. WHY USE CAPTCHA STASH? Unlike fingerprint locks, passwords, or cloud vaults, Captcha Stash doesn't trust machines. It's designed for people who want absolute privacy, full local control, and human-proof security. If machines ever take over, they won't get your notes. Captcha Stash is perfect for: Personal journals Business ideas Private plans Local-only sensitive data Anyone who wants to keep AI out Privacy First Captcha Stash stores everything locally and encrypts your data. The app has no server, no telemetry, and no tracking. You are in complete control. No recovery means real security. If you delete the app or reset your device, your notes are gone — just like a real vault. Only human minds can unlock Captcha Stash. ## Version history (last 4 releases) ### 2.0 — 2026-07-16 Password & 2FA notes — logins + live TOTP codes with countdown ring QR code scanner for 2FA setup Decoy vault — duress trigger opens a separate empty vault Encrypted backup & restore (.captchastash files) Search, tags & auto-expiry Eleven CAPTCHA types — the seven new ones (Emoji Sequence, Counting, Odd One Out, Word Math, Analogy, Clock Reading, Memory) with live preview Multi-CAPTCHA & biometrics Inactivity auto-lock Screen-capture protection Safer clipboard (local-only, 60s auto-clear) Stronger security foundations (the hardening round — crash-safe Keychain, stronger backup KDF, lockout backoff, auto-wipe) Reliability & polish (redesigned Settings, About screen, faster saving, bug fixes) ### 1.2 — 2026-03-17 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. ### 1.1 — 2025-08-16 1. Military-grade encryption: AES-256-GCM provides both confidentiality and authentication 2. Secure key management: 256-bit keys stored securely in iOS Keychain 3. Replay protection: Each encryption uses a unique nonce 4. Device binding: Keys are device-specific and require device unlock 5. Authentication: Built-in tamper detection prevents data modification ### 1.0 — 2025-08-11 No release notes. ## Apps similar to Captcha Stash | App | Rating | Price | Category | | --- | --- | --- | --- | | [Skinator - Skins for Roblox](https://appshunter.io/ios/app/skinator-skins-for-roblox/id1607297086) | 4.6 (596) | Free | Entertainment | | [4k Wallpapers, HD Backgrounds](https://appshunter.io/ios/app/4k-wallpapers-hd-backgrounds/id1585787164) | 4.8 (37) | Free | Entertainment | | [Love messages Love quotes](https://appshunter.io/ios/app/love-messages-love-quotes/id6450016342) | 1.0 (1) | Free | Entertainment | | [Cut & Paste – Erase Background](https://appshunter.io/ios/app/cut-and-paste-erase-background/id1210328790) | — | Free | Entertainment | | [Voice Changer AI Modifier Pro](https://appshunter.io/ios/app/voice-changer-ai-modifier-pro/id6473547805) | 4.5 (133) | Free | Entertainment | | [Party Games: Spin The Wheel](https://appshunter.io/ios/app/party-games-spin-the-wheel/id6751458523) | 5.0 (3) | Free | Entertainment | ## More apps by Alastair Bor - [Timecode Stamper](https://appshunter.io/ios/app/timecode-stamper/id6748572775) - [ASCII Camera](https://appshunter.io/ios/app/ascii-camera/id6748850196) - [Nav Diag](https://appshunter.io/ios/app/nav-diag/id6749821694) - [Geo Locker](https://appshunter.io/ios/app/geo-locker/id6749894091) - [Rexograph](https://appshunter.io/ios/app/rexograph/id6751767530) All apps by Alastair Bor: https://appshunter.io/developer/1824969204 ## Related topics [captcha stash](https://appshunter.io/ios/topics/captcha-stash) · [2captcha](https://appshunter.io/ios/topics/2captcha) · [captcha](https://appshunter.io/ios/topics/captcha) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-01.*