Royal TSi vs A3Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Royal TSi
Access and manage your remote systems securely from your mobile device. Connect via RDP, VNC, SSH, and more, or use Royal Server to manage Windows events, services, and processes directly.
- Secure RDP, VNC, SSH, Telnet connections
- Cloud storage integration (iCloud, Dropbox, Google Drive)
- Manage Windows Events, Services, and Processes
- Execute PowerShell scripts remotely
- Optimize connections for mobile devices
- Open Royal TS documents
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Royal TSi provides easy and secure access to your remote systems (RDP, VNC, SSH, etc.) by allowing you to open your Royal TS documents created with Royal TSX (for macOS) or Royal TS (for Windows). Those documents can be opened directly from any installed cloud provider like iCloud Drive, Dropbox or Google Drive. You can even send documents via email and open them with Royal TSi. Connecting to the remote machines with RDP, VNC, SSH or Telnet is possible with specialized 3rd party apps. With Royal Server you don't need to connect to the remote desktop anymore. You can manage Windows Events, Windows Services, Windows Processes, Terminal Services, Hyper-V and VMware virtual machines and start PowerShell scripts on the remote machine directly from your iPad or iPhone. E.g. if you find an error in the Event Log, then you could restart a service, kill a process, reset a Terminal Services connection or stop and start Hyper-V virtual machines. Using PowerShell scripts, there's no limit to what you can do! Some supported connection types can be tweaked and optimized for your mobile device. E.g. Remote desktop connections can be configured to always use a lower color depth or screen resolution to save bandwidth.
A3Calc
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A3 Small Format Interchangeable Core Calculator (sister app of A2Calc and A4Calc) ---Programmed by a Locksmith, for Locksmiths--- Automatically calculates the pinning chart for A3 SFIC. Built for 6 or 7 pin systems, however, less can be achieved by using a decimal to erase a chamber. Minimum of a control and master key are required to make a chart. Additional change key available for all devices; 2 change keys available for 16:9 screen devices. Randomize function will generate completely random charts each time it is triggered. "Lock/Unlock" toggle disables/enables all inputs and functions to prevent unwanted/lost changes. Control Finder is an added bonus by reverse engineering a core to determine the control key's bitting. This is perfect when needing to remove multiple cores in a building when the control key has been lost. There are two methods for achieving the control key: 1. using the master, control, and bottom pins, or 2. using only the top/driver pins. Up to 16 different projects can be saved at any one given time. All projects are encrypted and protected with a passcode when stored on your device. All projects can be exported via AirPrint and Email. Compatibility: iPhone / iPod touch on iOS 8.0 or later and iPad on iOS 12.0 or later. Found a bug? Something not working? Have a suggestion? Feel free to contact me via email: farren@phoxlocks.com
Screenshots
Verdict
The clearest difference is update cadence: Royal TSi at every 3 months against A3Calc's every 18 months. Royal TSi also leads on price ($0.99 vs $1.99). On ads, in-app purchases, device support and iOS requirement 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
Royal TSi costs $0.99 and A3Calc $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Royal TSi ships an update every 3 months, A3Calc every 18 months. Both last shipped on October 26, 2026.
| Parameter | Royal TSi | A3Calc |
|---|---|---|
| Price | $0.99 — better | $1.99 |
| Rating | 2.5 (2 ratings) — better | — |
| Positive reviews | 18.2% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 months — better | Every 18 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 97 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Royal Apps GmbH | Farren Domenici |
In-app purchases
Royal TSi
No in-app purchases
A3Calc
No in-app purchases









