# Nitty Gritty 4rex vs iNvas

The clearest difference is ads: Nitty Gritty 4rex at none against iNvas's shown. iNvas's advantage is update cadence (every 5 weeks vs every 36 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Nitty Gritty 4rex ships an update every 36 months, iNvas every 5 weeks. The most recent releases landed on May 16, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Nitty Gritty 4rex | iNvas |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 36 months | **Every 5 weeks** |
| Size | 7 MB | 42 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Nittygritty Solutions Ltd](https://appshunter.io/developer/1569060896) | [Interra Networks Limited](https://appshunter.io/developer/1710400392) |

## What reviewers say

### Nitty Gritty 4rex

[App page](https://appshunter.io/ios/app/nitty-gritty-4rex/id1569060894)

**Features:** macOS Compatibility

**In-app purchases:** none


### iNvas

[App page](https://appshunter.io/ios/app/invas/id6468676029)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Nitty Gritty 4rex free?

Nitty Gritty 4rex is free to download, with no in-app purchases.

### Is iNvas free?

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

### Do Nitty Gritty 4rex or iNvas have ads?

iNvas shows ads; Nitty Gritty 4rex does not.

### Which is updated more often, Nitty Gritty 4rex or iNvas?

Nitty Gritty 4rex ships an update every 36 months, and iNvas every 5 weeks. Most recently, Nitty Gritty 4rex was updated on May 16, 2026 and iNvas on September 15, 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.*