# Solid Mobile Key vs Placard Pro

The clearest difference is review sentiment: Placard Pro at 100% against Solid Mobile Key's 0%. Placard Pro also leads on rating (5.0 vs 1.0). Solid Mobile Key's advantage is iOS requirement (9.0 vs 18.6). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Placard Pro holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 0% of Solid Mobile Key's written reviews are positive against 100% of Placard Pro's.

Solid Mobile Key ships an update every 11 days, Placard Pro weekly. The most recent releases landed on October 7, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Solid Mobile Key | Placard Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/solid-mobile-key/id1315440413/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/placard-pro/id6771141233/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 days | **Weekly** |
| Monetization | Free | Free |
| Size | 11 MB | 11 MB |
| Requires iOS | **9.0** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SOLID-55](https://appshunter.io/developer/1635352606) | [Patriot Plunges LLC](https://appshunter.io/developer/1886595025) |

## What reviewers say

### Solid Mobile Key

[App page](https://appshunter.io/ios/app/solid-mobile-key/id1315440413)

Manage your home's iPS series doors remotely using your mobile phone. This system allows you to check if your door is locked, unlock it from a distance, grant or deny access to others, and receive security alerts.

**Highlights:** Remote door unlocking via phone call, Check door lock status, Grant and revoke access for users, Receive entry/exit notifications, Security breach alerts

**In-app purchases:** none


### Placard Pro

[App page](https://appshunter.io/ios/app/placard-pro/id6771141233)

Instantly verify hazardous materials compliance by scanning shipping documents. This tool provides real-time PASS, WARNING, or FAIL results with specific regulatory citations and placard requirements, designed for use in the truck cab.

**Highlights:** Scan Bills of Lading with phone camera, AI-powered OCR for hazmat extraction, Real-time validation against 49 CFR, Instant PASS/WARNING/FAIL results, Display required placard specifications, Offline validation capability, Fleet compliance dashboard

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

**In-app purchases:** none


## Frequently asked questions

### Is Solid Mobile Key free?

Solid Mobile Key is free to download, with no in-app purchases.

### Is Placard Pro free?

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

### Which has better reviews, Solid Mobile Key or Placard Pro?

Placard Pro is rated higher. Solid Mobile Key averages 1.0 out of 5 from 1 ratings, while Placard Pro averages 5.0 from 2 ratings.

### Do Solid Mobile Key or Placard Pro have ads?

Neither Solid Mobile Key nor Placard Pro shows ads.

### Which is updated more often, Solid Mobile Key or Placard Pro?

Solid Mobile Key ships an update every 11 days, and Placard Pro weekly. Most recently, Solid Mobile Key was updated on October 7, 2026 and Placard Pro on October 17, 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.*