# AMP SYSTEMS vs NB

The clearest difference is update cadence: AMP SYSTEMS at every 3 months against NB's every 8 months. 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.

AMP SYSTEMS ships an update every 3 months, NB every 8 months. The most recent releases landed on October 27, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | AMP SYSTEMS | NB |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 8 months |
| Size | 10 MB | 18 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Sterling Power](https://appshunter.io/developer/1639822244) | [Steamrock Inc.](https://appshunter.io/developer/1705604272) |

## What reviewers say

### AMP SYSTEMS

[App page](https://appshunter.io/ios/app/amp-systems/id1639822242)

**Features:** macOS Compatibility

**In-app purchases:** none


### NB

[App page](https://appshunter.io/ios/app/nb-42-barometer/id6503903082)

**In-app purchases:** none


## Frequently asked questions

### Is AMP SYSTEMS free?

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

### Is NB free?

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

### Do AMP SYSTEMS or NB have ads?

Neither AMP SYSTEMS nor NB shows ads.

### Which is updated more often, AMP SYSTEMS or NB?

AMP SYSTEMS ships an update every 3 months, and NB every 8 months. Most recently, AMP SYSTEMS was updated on October 27, 2026 and NB on November 4, 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.*