SIDT vs CypherAir
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SIDT
This tool allows developers to debug and analyze HTTP requests. It supports various HTTP methods, header and parameter editing, and multiple encoding options. View responses in different formats, search results, and exchange data via QR code or Multipeer Connectivity.
- POST/GET/PUT/DELETE/HEAD method support
- Header and parameter editing
- Base64, MD5, SHA, CRC encoding
- Response data display (Web/Text/JSON)
- Data exchange via QR code/Multipeer Connectivity
- Safari Share Extension integration
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A Developer HTTP Request Debug Analyse Tool. - POST/GET/PUT/DELETE/HEAD Method support - Header, Parameter edit - Base64, MD5, SHA, CRC encoding - Timeout Setting - Response Data display in Web/Text/JSON format mode - Search Bar in Fire Result - JSON formatted display - Sent Request info - Status info - Response Cast Time - Data List edit/search - Data Exchange by Multipeer Connectivity and QR code - Directly add Data in Safari Share Extension - Search SIDT data in Spotlight - Also offer SIDT on macOS
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.
Screenshots
Verdict
The clearest difference is update cadence: CypherAir at every 2 days against SIDT's every 2 weeks. SIDT's advantage is iOS requirement (11.0 vs 26.5). 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.
SIDT ships an update every 2 weeks, CypherAir every 2 days. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.
| Parameter | SIDT | CypherAir |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (3 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac, Vision Pro — better |
| Requires iOS | 11.0 — better | 26.5 |
| Further details — not scored | ||
| Size | 14 MB | 79 MB |
| Age rating | 4+ | 4+ |
| Developer | 旭 赵 | 康 陈 |
In-app purchases
SIDT
No in-app purchases
CypherAir
No in-app purchases









