# Solid Mobile Key vs Ringder Smart

The clearest difference is update cadence: Solid Mobile Key at every 11 days against Ringder Smart's every 19 months. Solid Mobile Key also leads on iOS requirement (9.0 vs 14.0). 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.

Solid Mobile Key ships an update every 11 days, Ringder Smart every 19 months. The most recent releases landed on October 7, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Solid Mobile Key | Ringder Smart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/solid-mobile-key/id1315440413/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 19 months |
| Monetization | Free | — |
| Size | 11 MB | 185 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SOLID-55](https://appshunter.io/developer/1635352606) | [Xuzhou Ringder Electrical Equipment Co., Ltd](https://appshunter.io/developer/1790348646) |

## 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


### Ringder Smart

[App page](https://appshunter.io/ios/app/ringder-smart/id6740510175)

**Features:** 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 Ringder Smart free?

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

### Do Solid Mobile Key or Ringder Smart have ads?

Neither Solid Mobile Key nor Ringder Smart shows ads.

### Which is updated more often, Solid Mobile Key or Ringder Smart?

Solid Mobile Key ships an update every 11 days, and Ringder Smart every 19 months. Most recently, Solid Mobile Key was updated on October 7, 2026 and Ringder Smart on October 13, 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.*