# NAC vs YellowGrid

The clearest difference is in-app purchases: YellowGrid at none against NAC's 1. NAC's advantage is iOS requirement (13.0 vs 16.4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. NAC sells 1 in-app purchase, starting at $199.00 per year. YellowGrid asks for nothing beyond the download.

NAC ships an update fortnightly, YellowGrid every 2 weeks. The most recent releases landed on September 14, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | NAC | YellowGrid |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 weeks |
| Size | 3 MB | 93 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Neubert Aero Corp](https://appshunter.io/developer/1785752651) | [YellowGrid](https://appshunter.io/developer/1896555484) |

## What reviewers say

### NAC

[App page](https://appshunter.io/ios/app/nac-dfd-decelerometer/id6478895830)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| U.S. Region | $199.00 | per year |


### YellowGrid

[App page](https://appshunter.io/ios/app/yellowgrid/id6747118921)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NAC free?

NAC is free to download, with in-app purchases available.

### Is YellowGrid free?

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

### Do NAC or YellowGrid have ads?

Neither NAC nor YellowGrid shows ads.

### Which is updated more often, NAC or YellowGrid?

NAC ships an update fortnightly, and YellowGrid every 2 weeks. Most recently, NAC was updated on September 14, 2026 and YellowGrid on September 9, 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.*