Comparison

OCaml vs SchemaHD

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

OCaml

Learn and practice OCaml programming with an integrated editor and interactive top-level interpreter. This app provides offline functionality and step-by-step learning modules for variables, conditions, and loops, with new content added regularly.

Highlights
  • Integrated OCaml editor
  • Interactive top-level interpreter
  • Offline code execution
  • Step-by-step learning chapters
  • Customizable editor settings
  • Save and open .ml files
Features
Read full description

The all-in-one OCaml bundle for iOS, iPadOS and macOS! Learn the language and practice with a powerful editor and interactive top level available in the app, working offline. CODE - Write OCaml code directly from the app, and execute it with an interactive top level - Save your code in .ml files to open again them later - No need to install additional tools, OCaml is shipped with the app, and works offline - Customize the editor settings to make it yours LEARN - Learn OCaml step by step with chapters about variables, conditions, loops, … - New chapters are added frequently - It’s quick and easy! Don’t wait, start learning and playing with OCaml for free now! Application developed by Nathan Fallet © 2021 Groupe MINASTE

About

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.

Highlights
  • Draw logic circuit diagrams
  • Generate Verilog HDL
  • Perform circuit simulations
  • Touch-based wiring
  • AXI bus interface support
  • JSON import/export
  • Offline network operation
Features
Read full description

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.

Screenshots

OCaml3 screens

Verdict

The call

The clearest difference is rating: OCaml at 4.6 against SchemaHD's 3.0. OCaml also leads on review sentiment (64% vs 50%) and ratings volume (17 vs 2). SchemaHD's advantage is monetization model (free vs free with in-app purchases) and update cadence (every 10 days vs monthly). On price, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. OCaml sells 3 one-off in-app purchases and SchemaHD sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

OCaml holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: OCaml has 17 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 64% of OCaml's written reviews are positive against 50% of SchemaHD's.

UpkeepUpdate frequency

OCaml ships an update monthly, SchemaHD every 10 days. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 4 level
OCaml versus SchemaHD: the parameters behind the verdict, then further details
ParameterOCamlSchemaHD
PriceFreeFree
Rating4.6 (17 ratings) — better3.0 (2 ratings)
Positive reviews64.0% of reviews — better50.0% of reviews
Number of ratings17 — better2
Update frequencyMonthlyEvery 10 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Mac — betteriPad
Requires iOS15.014.0 — better
Further details — not scored
Size38 MB2 MB
Age rating4+4+
DeveloperGroupe MINASTEYasuaki Iwasaki

Customer experience

OCaml

All ratings17 ratings
Positive94.1%
Neutral0.0%
Negative5.9%
Written reviews25 reviews
Positive64.0%
Neutral4.0%
Negative32.0%

SchemaHD

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

3 purchases

OCaml

One-time3
  • Donation 1$0.99
  • Donation 2$2.99
  • Donation 3$4.99
7 purchases

SchemaHD

One-time7
  • Give a tip #1$1.99
  • Give a tip #2$3.99
  • Give a tip #3$7.99
Show 4 more
  • Give a tip #4$15.99
  • Give a tip #5$23.99
  • Give a tip #6$39.99
  • Give a tip #7$79.99

Questions

Is OCaml free?
OCaml is free to download, with in-app purchases available.
Is SchemaHD free?
SchemaHD is free to download, with in-app purchases available.
Which has better reviews, OCaml or SchemaHD?
OCaml is rated higher. OCaml averages 4.6 out of 5 from 17 ratings, while SchemaHD averages 3.0 from 2 ratings.
Do OCaml or SchemaHD have ads?
Neither OCaml nor SchemaHD shows ads.
Which is updated more often, OCaml or SchemaHD?
OCaml ships an update monthly, and SchemaHD every 10 days. Most recently, OCaml was updated on November 7, 2026 and SchemaHD on November 3, 2026.

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