# TrueAuth vs SpecScan VIN Decoder

The clearest difference is in-app purchases: TrueAuth at none against SpecScan VIN Decoder's 3. SpecScan VIN Decoder's advantage is update cadence (every 5 days vs fortnightly) and iOS requirement (15.5 vs 17.6). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. SpecScan VIN Decoder sells 3 in-app purchases, starting at $19.99 per month. TrueAuth asks for nothing beyond the download.

TrueAuth ships an update fortnightly, SpecScan VIN Decoder every 5 days. The most recent releases landed on October 7, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | TrueAuth | SpecScan VIN Decoder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/specscan-vin-decoder/id6800496761/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | Free | Free |
| Size | 12 MB | 42 MB |
| Requires iOS | 17.6 | **15.5** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AtomicFI](https://appshunter.io/developer/1632094401) | [SpecScan LLC](https://appshunter.io/developer/6800497213) |

## What reviewers say

### TrueAuth

[App page](https://appshunter.io/ios/app/trueauth/id6469057884)

This utility app offers secure and private authorization processes. It focuses on providing a safe way to manage authentication flows.

**Highlights:** Secure authorization flows, Private authentication, User authentication management

**In-app purchases:** none


### SpecScan VIN Decoder

[App page](https://appshunter.io/ios/app/specscan-vin-decoder/id6800496761)

Instantly determine a car's real market value using its VIN. Decode year, make, model, and factory options, then compare against live dealer listings. Ideal for buyers, sellers, enthusiasts, and dealers.

**Highlights:** Real market value with confidence rating, Comparable listings with prices and links, Deal analysis and offer price suggestions, Factory options decoded from VIN, Buyer guidance and negotiation tips, VIN scanning via door-jamb barcode

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SpecScan Starter | $19.99 | per month |
| SpecScan Pro | $49.99 | per month |
| SpecScan Ultimate | $99.99 | per month |


## Frequently asked questions

### Is TrueAuth free?

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

### Is SpecScan VIN Decoder free?

SpecScan VIN Decoder is free to download, with in-app purchases available.

### Do TrueAuth or SpecScan VIN Decoder have ads?

Neither TrueAuth nor SpecScan VIN Decoder shows ads.

### Which is updated more often, TrueAuth or SpecScan VIN Decoder?

TrueAuth ships an update fortnightly, and SpecScan VIN Decoder every 5 days. Most recently, TrueAuth was updated on October 7, 2026 and SpecScan VIN Decoder on October 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.*