# OCaml vs SchemaHD

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.

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.

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.

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

## The numbers

| Metric | OCaml | SchemaHD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (17 ratings)](https://appshunter.io/ios/app/ocaml-learn-and-code/id1547506826/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/schemahd/id1578851758/reviews) |
| Number of ratings | **17** | 2 |
| Positive reviews | **64.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 38 MB | 2 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Groupe MINASTE](https://appshunter.io/developer/1378426984) | [Yasuaki Iwasaki](https://appshunter.io/developer/560857505) |

## What reviewers say

### OCaml

[App page](https://appshunter.io/ios/app/ocaml-learn-and-code/id1547506826)

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:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Donation 1 | $0.99 | one-time |
| Donation 2 | $2.99 | one-time |
| Donation 3 | $4.99 | one-time |


### SchemaHD

[App page](https://appshunter.io/ios/app/schemahd/id1578851758)

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:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Give a tip #1 | $1.99 | one-time |
| Give a tip #2 | $3.99 | one-time |
| Give a tip #3 | $7.99 | one-time |
| Give a tip #4 | $15.99 | one-time |
| Give a tip #5 | $23.99 | one-time |
| Give a tip #6 | $39.99 | one-time |
| Give a tip #7 | $79.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*