# Spectra Premium vs Holtek MCU Selector

The clearest difference is iOS requirement: Spectra Premium at 9.0 against Holtek MCU Selector's 13.0. On price, update cadence, 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.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Spectra Premium | Holtek MCU Selector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/spectra-premium/id1048985246/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 196 MB | 19 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [9322-5613 Quebec Inc](https://appshunter.io/developer/497196359) | [Holtek Semiconductor(China) Inc](https://appshunter.io/developer/1052056181) |

## What reviewers say

### Spectra Premium

[App page](https://appshunter.io/ios/app/spectra-premium/id1048985246)

Easily find compatible vehicle parts by searching with plate number, VIN, or vehicle details. Utilize camera-based scanning for plates, VINs, or product codes, and even find competitor part equivalents. Access product videos, promotional info, and direct contact with experts.

**Highlights:** Search by plate number, VIN, or vehicle details, Camera-based VIN and plate number scanning, Search by product code with camera or manual entry, Find competitor part equivalents, View product videos and promotional information, Direct contact with experts, Parts history and favorites

**Features:** Vision Pro support

**In-app purchases:** none


### Holtek MCU Selector

[App page](https://appshunter.io/ios/app/holtek-mcu-selector/id6444018542)

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

**In-app purchases:** none


## Frequently asked questions

### Is Spectra Premium free?

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

### Is Holtek MCU Selector free?

Holtek MCU Selector is free to download, with no in-app purchases.

### Do Spectra Premium or Holtek MCU Selector have ads?

Neither Spectra Premium nor Holtek MCU Selector shows ads.

### Which is updated more often, Spectra Premium or Holtek MCU Selector?

Spectra Premium ships an update every 2 months, and Holtek MCU Selector every 2 months. Most recently, Spectra Premium was updated on October 24, 2026 and Holtek MCU Selector on October 25, 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.*