CypherAir vs DocProtect
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CypherAir
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CypherAir is a fully offline, open-source OpenPGP encryption tool built for iOS, iPadOS, macOS and VisionOS. It makes zero network connections. There is no telemetry, no tracking, and no possibility of data leakage. Two Encryption Profiles • Universal (Profile A) — Interoperable with GnuPG and all major PGP implementations. RFC 4880 compliant, employing Ed25519 and X25519 with SEIPDv1. • Advanced (Profile B) — Implements the latest OpenPGP standard, RFC 9580, with Ed448 and X448, authenticated encryption via AEAD (SEIPDv2), and Argon2id passphrase protection. Capabilities • Encrypt and decrypt text and files, processed as streams for efficiency • Create digital signatures — cleartext for messages, detached for files • Exchange public keys through QR codes using the system Camera, with no camera permission required • Manage multiple keys, each with its own encryption profile • Safeguard private keys in the Secure Enclave, unlocked only by Face ID or Touch ID Privacy Through Architecture • The sole system permission is the Face ID usage description • Private keys never leave the protection of Secure Enclave wrapping Open Source CypherAir is open source and available under the GNU General Public License v3.0 or later (GPL-3.0-or-later) or the Mozilla Public License 2.0 (MPL-2.0). Additional languages are in progress. Disclaimer No Warranty: You expressly acknowledge and agree that use of the Licensed Application is at your sole risk. To the maximum extent permitted by applicable law, the Licensed Application and any services performed or provided by the Licensed Application are provided "as is" and "as available," with all faults and without warranty of any kind, and Licensor hereby disclaims all warranties and conditions with respect to the Licensed Application and any services, either express, implied, or statutory, including, but not limited to, the implied warranties and/or conditions of merchantability, of satisfactory quality, of fitness for a particular purpose, of accuracy, of quiet enjoyment, and of noninfringement of third-party rights. No oral or written information or advice given by Licensor or its authorized representative shall create a warranty. Should the Licensed Application or services prove defective, you assume the entire cost of all necessary servicing, repair, or correction. Some jurisdictions do not allow the exclusion of implied warranties or limitations on applicable statutory rights of a consumer, so the above exclusion and limitations may not apply to you.
DocProtect
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DocProtect protects your ID documents before you share them. Add custom watermarks and redact sensitive data (ID numbers, account numbers, addresses…) directly from your iPhone or iPad. Everything is processed on your device: no servers, no accounts, no sign-up. ▸ 4 watermark styles Subtle, diagonal, full and waves, with custom text that automatically includes the date and recipient. ▸ Redaction tools Brush, rectangle and eraser with 4 sizes. Precisely hide ID numbers, account numbers, addresses or any sensitive data. ▸ 100% offline and private Everything is processed on your device. No servers, no analytics: your document never leaves your iPhone. ▸ Apple Pencil Native pressure sensitivity: stroke thickness adapts to how hard you press. ▸ Built-in camera Take the photo from the app itself. It's processed in memory and never saved to your camera roll. ▸ iPhone and iPad Universal app with adaptive layout: sidebar and Split View on iPad. Personal plan (free): • Watermark with date and recipient • 4 styles + full redaction tools • Camera, gallery and file import (including PDF) • Black & white and resize • 5 exports per day • "Document protected with DocProtect" seal Perfect for safely sending copies of your ID, passport or any document to banks, real estate agencies, offices or any procedure. Total privacy: 100% local processing, no analytics and no accounts. Requires iOS 17 or later.
Screenshots
Verdict
The clearest difference is update cadence: DocProtect at daily against CypherAir's every 2 days. DocProtect also leads on iOS requirement (17.0 vs 26.5). CypherAir's advantage is device support (4 vs 2). On price, ads and in-app purchases 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.
CypherAir ships an update every 2 days, DocProtect daily. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.
| Parameter | CypherAir | DocProtect |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, Mac, Vision Pro — better | iPhone, iPad |
| Requires iOS | 26.5 | 17.0 — better |
| Further details — not scored | ||
| Size | 79 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | 康 陈 | Color Vivo Internet, SL |
In-app purchases
CypherAir
No in-app purchases
DocProtect
No in-app purchases









