# NSYS Buy Back vs Lunar Installer

The clearest difference is update cadence: Lunar Installer at every 8 days against NSYS Buy Back's every 2 months. NSYS Buy Back's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 16.4). On price, ads and in-app purchases 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, Lunar Installer every 8 days. The most recent releases landed on November 9, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | NSYS Buy Back | Lunar Installer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/lunar-installer/id6670309375/reviews)** |
| Number of ratings | — | **5** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 8 days** |
| Monetization | — | Free |
| Size | 23 MB | 216 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Grigoriy Glazman](https://appshunter.io/developer/1448501053) | [Lunar Energy Limited](https://appshunter.io/developer/1400433604) |

## What reviewers say

### NSYS Buy Back

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Lunar Installer

[App page](https://appshunter.io/ios/app/lunar-installer/id6670309375)

This utility app simplifies the setup of a specific system with guided processes, firmware updates, and automated testing. It provides in-app troubleshooting and live chat support to ensure successful operation and avoid return visits to job sites.

**Highlights:** Guided system setup process, Rapid firmware updates, Automated operational tests, In-app troubleshooting, Live chat 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 Lunar Installer free?

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

### Do NSYS Buy Back or Lunar Installer have ads?

Neither NSYS Buy Back nor Lunar Installer shows ads.

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

NSYS Buy Back ships an update every 2 months, and Lunar Installer every 8 days. Most recently, NSYS Buy Back was updated on November 9, 2026 and Lunar Installer on November 8, 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.*