# ChernoGrid vs Model Engine Builder

The clearest difference is in-app purchases: ChernoGrid at none against Model Engine Builder's 1. ChernoGrid also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Model Engine Builder sells 1 one-off in-app purchase. ChernoGrid asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 7, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | ChernoGrid | Model Engine Builder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 days | Every 5 days |
| Size | 53 MB | 20 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bugrahan Kok](https://appshunter.io/developer/1883365083) | [MIN GYu OH](https://appshunter.io/developer/6803589847) |

## What reviewers say

### ChernoGrid

[App page](https://appshunter.io/ios/app/chernogrid-energy-tycoon/id6771516191)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Model Engine Builder

[App page](https://appshunter.io/ios/app/model-engine-builder/id6803801661)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| removeads | $1.99 | one-time |


## Frequently asked questions

### Is ChernoGrid free?

ChernoGrid is free to download, with no in-app purchases.

### Is Model Engine Builder free?

Model Engine Builder is free to download, with in-app purchases available.

### Do ChernoGrid or Model Engine Builder have ads?

Model Engine Builder shows ads; ChernoGrid does not.

### Which is updated more often, ChernoGrid or Model Engine Builder?

ChernoGrid ships an update every 5 days, and Model Engine Builder every 5 days. Most recently, ChernoGrid was updated on October 7, 2026 and Model Engine Builder on October 21, 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.*