King Sound vs CypherAir
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
King Sound
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KingSound motion sensor speaker adopts mature pyroelectric human body induction technology, built-in Wi-Fi module, and uses mobile APP to operate. It can choose to play different voice content according to different places and different time periods, easy to install and easy to operate. Widely used in Government, exhibition halls, supermarkets, stations, airports and other places. Features * Motion sensor can be accurately recognized when a person passes by, and play sound. * Support external trigger control, timing play, interval time play. * MP3 audio format playback, beautiful sound quality. * Support Wi-Fi connection, use the mobile APP to set the timing, easy to operate. * 1 ~ 50 sets of timing data can be set. * Voice update is convenient, you can automatically update the voice files by U disk. * Built-in flash memory, the duration of voice playback can be customized according to customer needs. * Can set the loop playback function. * With clock display function, the current time will be automatically updated after connecting the phone.
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 β’ Universal (Profile A) β Interoperable with GnuPG and all major PGP implementations. RFC 4880 compliant, employing Ed25519 and X25519 with SEIPDv1. β’ Advanced (Profile B) β Implements the latest OpenPGP standard, RFC 9580, with Ed448 and X448, authenticated encryption via AEAD (SEIPDv2), and Argon2id passphrase protection. Capabilities β’ Encrypt and decrypt text and files, processed as streams for efficiency β’ Create digital signatures β cleartext for messages, detached for files β’ Exchange public keys through QR codes using the system Camera, with no camera permission required β’ Manage multiple keys, each with its own encryption profile β’ Safeguard private keys in the Secure Enclave, unlocked only by Face ID or Touch ID Privacy Through Architecture β’ The sole system permission is the Face ID usage description β’ 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 King Sound's every 22 months. King Sound's advantage is iOS requirement (9.0 vs 26.5). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
King Sound ships an update every 22 months, CypherAir every 2 days. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.
| Parameter | King Sound | CypherAir |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 22 months | Every 2 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac, Vision Pro β better |
| Requires iOS | 9.0 β better | 26.5 |
| Further details β not scored | ||
| Size | 19 MB | 79 MB |
| Age rating | 4+ | 4+ |
| Developer | Waytronic Electronics Company Limited | εΊ· ι |
In-app purchases
King Sound
No in-app purchases
CypherAir
No in-app purchases









