4x4 Multiviewer Control vs PGPKit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
4x4 Multiviewer Control
This utility app enables seamless switching between four input sources for video walls and multiview displays. It supports 2x2 video wall configurations and offers flexible multiview options including PIP and POP modes with priority settings.
- 2x2 Video-Wall mode
- 4 selectable input sources
- Seamless switching
- Multiview mode with scaling
- PIP and POP support
- PIP priority setting
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Video-Wall mode supports 2 x 2 Video-Wall with 4 selectable input sources Support 4 input and 4 multiview windows seamless switching Multiview mode support scales and sizes each picture. Multiview mode support PIP, POP and set PIP priority
PGPKit
Securely send and receive encrypted messages with anyone using standard PGP implementations. This app handles the complexities of encryption, ensuring your communications are private and verifiable, all processed directly on your device without servers or accounts.
- Send and receive encrypted messages
- Verify message authenticity
- Repair damaged encrypted messages
- Secure key backups
- Face ID for key access
- Offline operation
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PGPKit is PGP for people who want it to work. Send an encrypted message to anyone who uses GnuPG, Thunderbird, Proton Mail or OpenKeychain. Read what they send back. Check that a message really came from who it says. Every operation happens on your iPhone — there is no account, no server, and no analytics. INTEROP YOU CAN COUNT ON PGPKit is tested against four independent OpenPGP implementations — GnuPG, Sequoia, RNP (the engine inside Thunderbird) and GopenPGP (the engine inside Proton). Keys it creates are standard OpenPGP v4, readable everywhere. PASTE ANYTHING Copy an encrypted message from any mail app and tap Paste. PGPKit repairs the damage mail apps do — stray quote marks, broken line endings, extra spaces — and works out whether it is a message, a signature or a key. ERRORS THAT MAKE SENSE Instead of "decryption failed", PGPKit tells you what happened and what to do: the message was encrypted to a different key, the passphrase is wrong, the file was damaged in transit. YOUR KEYS NEVER GET LOST Creating a key walks you straight into a backup, protected by a passphrase you choose, and verified by opening it again before you save it. The backup is a standard OpenPGP file that GnuPG can open too. FACE ID INSTEAD OF TYPING Choose to remember a key's unlock and Face ID opens it in an instant. The unlocked key is held by iOS behind Face ID, never synced, never backed up. PRIVATE BY DESIGN • Keys stay in this phone's Keychain, excluded from iCloud and backups • No account, no analytics, no ads, no crash reporting • No version line or device details in anything you send; the one-line “Made with PGPKit” note switches off in Privacy & Data • Works in airplane mode PGPKIT PRO — ONE PURCHASE, NO SUBSCRIPTION More than one identity, large file encryption, standalone signatures, printed paper backups, key lookup by email and a packet inspector. Decrypting, verifying, backups and restoring are always free.
Screenshots
Verdict
The clearest difference is rating: PGPKit at 5.0 against 4x4 Multiviewer Control's 1.0. 4x4 Multiviewer Control's advantage is in-app purchases (none vs 1) and iOS requirement (10.3 vs 16.4). On price, ratings volume, ads 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. PGPKit sells 1 one-off in-app purchase. 4x4 Multiviewer Control asks for nothing beyond the download.
PGPKit holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
| Parameter | 4x4 Multiviewer Control | PGPKit |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | — | Every 2 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 10.3 — better | 16.4 |
| Further details — not scored | ||
| Size | 4 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | SHAO CHUN KUO | Can You Grab It LLC |
Customer experience
4x4 Multiviewer Control
PGPKit
In-app purchases
4x4 Multiviewer Control
No in-app purchases
PGPKit
- PGPKit Pro$9.99





