# TTC App vs InEight Legacy Model

The clearest difference is update cadence: InEight Legacy Model at every 2 months against TTC App's every 11 months. TTC App's advantage is iOS requirement (16.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

TTC App ships an update every 11 months, InEight Legacy Model every 2 months. The most recent releases landed on October 17, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | TTC App | InEight Legacy Model |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 months** |
| Size | 13 MB | 45 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Heavy Construction Systems Specialists, Inc.](https://appshunter.io/developer/720784425) | [InEight Inc](https://appshunter.io/developer/1225755584) |

## What reviewers say

### TTC App

[App page](https://appshunter.io/ios/app/ttc-app/id1452360143)

**Features:** macOS Compatibility

**In-app purchases:** none


### InEight Legacy Model

[App page](https://appshunter.io/ios/app/ineight-legacy-model/id6458876457)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TTC App free?

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

### Is InEight Legacy Model free?

InEight Legacy Model is free to download, with no in-app purchases.

### Do TTC App or InEight Legacy Model have ads?

Neither TTC App nor InEight Legacy Model shows ads.

### Which is updated more often, TTC App or InEight Legacy Model?

TTC App ships an update every 11 months, and InEight Legacy Model every 2 months. Most recently, TTC App was updated on October 17, 2026 and InEight Legacy Model 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.*