# NSYS Buy Back vs EinkPin

The clearest difference is update cadence: EinkPin at every 9 days against NSYS Buy Back's every 2 months. NSYS Buy Back's advantage is 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, EinkPin every 9 days. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | NSYS Buy Back | EinkPin |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Size | 23 MB | 3 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Grigoriy Glazman](https://appshunter.io/developer/1448501053) | [Beijing Zizai Technology Co.,Ltd.](https://appshunter.io/developer/736738603) |

## What reviewers say

### NSYS Buy Back

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

**Features:** macOS Compatibility

**In-app purchases:** none


### EinkPin

[App page](https://appshunter.io/ios/app/einkpin/id6793908983)

**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 EinkPin free?

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

### Do NSYS Buy Back or EinkPin have ads?

Neither NSYS Buy Back nor EinkPin shows ads.

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

NSYS Buy Back ships an update every 2 months, and EinkPin every 9 days. Most recently, NSYS Buy Back was updated on November 9, 2026 and EinkPin on October 31, 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.*