# NSYS Buy Back vs NSKEY Ready

The clearest difference is update cadence: NSYS Buy Back at every 2 months against NSKEY Ready's every 16 months. NSYS Buy Back also leads on iOS requirement (12.0 vs 15.6). 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.

NSYS Buy Back ships an update every 2 months, NSKEY Ready every 16 months. The most recent releases landed on October 28, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | NSYS Buy Back | NSKEY Ready |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 16 months |
| Size | 23 MB | 52 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Grigoriy Glazman](https://appshunter.io/developer/1448501053) | [NSKEY IKE](https://appshunter.io/developer/1822949158) |

## What reviewers say

### NSYS Buy Back

[App page](https://appshunter.io/ios/app/nsys-buy-back/id1545431029)

**Features:** macOS Compatibility

**In-app purchases:** none


### NSKEY Ready

[App page](https://appshunter.io/ios/app/nskey-ready/id6747802353)

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

**In-app purchases:** none


## Frequently asked questions

### Is NSYS Buy Back free?

NSYS Buy Back is free to download, with no in-app purchases.

### Is NSKEY Ready free?

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

### Do NSYS Buy Back or NSKEY Ready have ads?

Neither NSYS Buy Back nor NSKEY Ready shows ads.

### Which is updated more often, NSYS Buy Back or NSKEY Ready?

NSYS Buy Back ships an update every 2 months, and NSKEY Ready every 16 months. Most recently, NSYS Buy Back was updated on October 28, 2026 and NSKEY Ready on October 26, 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.*