SchemaHD vs MAVLink Telemetry
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SchemaHD
This app allows users to draw circuit diagrams for logic circuits, generating Verilog HDL and performing simulations. It simplifies FPGA development by using schematics instead of complex programming languages, offering advanced security and high-performance parallel processing.
- Draw logic circuit diagrams
- Generate Verilog HDL
- Perform circuit simulations
- Touch-based wiring
- AXI bus interface support
- JSON import/export
- Offline network operation
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FPGAs can dynamically generate logic circuits by means of configuration bit streams generated by languages such as Verilog and VHDL. The generated logic circuit cannot be changed by communication data. Therefore, it is very safe and cannot be attacked by hacking, which is a problem with CPUs, to execute arbitrary commands. In addition, the generated logic circuits are all running simultaneously, so the highest performance parallel processing is being performed. It can also generate logic circuits using configuration bitstreams at very high speed. Most of the processing that can be done by the CPU can be done by the FPGA alone. With advanced security and the highest performace, FPGAs are the perfect device for the modern age. However, it takes a lot of effort to learn languages such as Verilog and VHDL. There are other methods such as high-level synthesis from C/C++, but they require a lot of adjustments such as #pragma, and do not maximize the capabilities of the FPGA. Schematics, not programming languages, are needed to maximize the capabilities of FPGAs and to further improve developer productivity. Schematics allow you to grasp the whole picture at a glance, and can perfectly represent parallel processing. SchemaHD is to draw a circuit diagram of a logic circuit, and it's possible to do generation of Verilog HDL and a simulation. A made circuit diagram can be used by a different circuit diagram immediately. You can also install wiring easily by touch operation. A concept of interface is adopted as a terminal, so something structured of a AXI bus can also be used. A terminal it's also possible to distinguish sound argument reason, negative logic and characteristic wiring of a clock and a reset by interface, and which is different in interface, they don't seem able to connect, it is. You can input and output as a JSON file, so the made circuit diagram and interface are also capable of cooperation with other application. Verilog HDL generated from a circuit diagram contains a comment of a terminal name and an instance name, so it's capable of the correspondence which is at the time of problem occurrence. A network connection isn't needed, so it's also effective in information leak prevention. A simple simulation is offered in the present, but it's expected to enhance it early.
MAVLink Telemetry
Monitor live flight data from MAVLink-compatible drones in real-time. Track altitude, speed, GPS, battery, and more on an interactive map with system health indicators. Ideal for professional drone operators needing field telemetry.
- Real-time MAVLink telemetry via UDP
- Live map with flight trail tracking
- Battery, GPS, and RC signal monitoring
- System health dashboard
- Flight timer and altitude tracking
- Demo mode for exploration
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MAVLink Telemetry gives you real-time flight data from any MAVLink-compatible drone, directly on your iPhone. Built for professional and commercial drone operators who need reliable, at-a-glance telemetry in the field. Live Telemetry Dashboard Monitor altitude, ground speed, vertical speed, GPS coordinates, satellite count, battery level, RC signal strength, and flight mode. Interactive Flight Map Track your drone's live position and flight path on a full-screen map with heads-up telemetry overlay. System Health Monitoring Keep tabs on accelerometer, gyroscope, magnetometer, GPS, and battery status with clear health indicators. Key Features · Real-time MAVLink telemetry via UDP · Live map with flight trail tracking · Battery, GPS, and RC signal monitoring · Flight timer and altitude tracking · System health dashboard · Configurable connection settings · Demo mode to explore the app without a drone Compatibility Works with PX4 and any MAVLink-compatible flight controller over UDP. Default port 14540, configurable in Settings.
Screenshots
Verdict
The clearest difference is rating: MAVLink Telemetry at 5.0 against SchemaHD's 3.0. MAVLink Telemetry also leads on in-app purchases (none vs 7). SchemaHD's advantage is iOS requirement (14.0 vs 18.0). On price, ratings volume, update cadence and ads 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. SchemaHD sells 7 one-off in-app purchases. MAVLink Telemetry asks for nothing beyond the download.
MAVLink Telemetry holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
SchemaHD ships an update every 10 days, MAVLink Telemetry every 2 weeks. The most recent releases landed on October 10, 2026 and October 22, 2026 respectively.
| Parameter | SchemaHD | MAVLink Telemetry |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 10 days — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPad | iPhone, iPad — better |
| Requires iOS | 14.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 2 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Yasuaki Iwasaki | Random Noise Studios |
Customer experience
SchemaHD
MAVLink Telemetry
In-app purchases
SchemaHD
- Give a tip #1$1.99
- Give a tip #2$3.99
- Give a tip #3$7.99
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- Give a tip #4$15.99
- Give a tip #5$23.99
- Give a tip #6$39.99
- Give a tip #7$79.99
MAVLink Telemetry
No in-app purchases
Questions
Is SchemaHD free?
Is MAVLink Telemetry free?
Which has better reviews, SchemaHD or MAVLink Telemetry?
Do SchemaHD or MAVLink Telemetry have ads?
Which is updated more often, SchemaHD or MAVLink Telemetry?
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