# Engineering Station vs WDM

The clearest difference is in-app purchases: Engineering Station at none against WDM's 1. Engineering Station also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.0). WDM's advantage is update cadence (every 9 days vs every 27 months). On price and ads there is nothing between them.

Both are free to download. WDM sells 1 one-off in-app purchase. Engineering Station asks for nothing beyond the download.

Engineering Station ships an update every 27 months, WDM every 9 days. The most recent releases landed on September 22, 2026 and August 2, 2026 respectively.

## The numbers

| Metric | Engineering Station | WDM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (5 ratings)](https://appshunter.io/ios/app/wdm-message-without-saving/id6450598935/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 9 days** |
| Monetization | — | Free with in-app purchases |
| Size | 93 MB | 9 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Ahmed Ahmed](https://appshunter.io/developer/1603830208) | [Ravi Pansuriya](https://appshunter.io/developer/1633190964) |

## What reviewers say

### Engineering Station

[App page](https://appshunter.io/ios/app/engineering-station/id1603830206)

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

**In-app purchases:** none


### WDM

[App page](https://appshunter.io/ios/app/wdm-message-without-saving/id6450598935)

Instantly start chats with unsaved numbers without cluttering your contacts. Paste or scan numbers, and begin messaging immediately. Features smart detection and a history of recent conversations for effortless communication.

**Highlights:** Start instant chats with unsaved numbers, Smart number detection from clipboard, Scan numbers and QR codes, Built-in dialer, History of recent conversations, Ad-free experience

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Us a Coffee | $0.99 | one-time |


## Frequently asked questions

### Is Engineering Station free?

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

### Is WDM free?

WDM is free to download, with in-app purchases available.

### Do Engineering Station or WDM have ads?

Neither Engineering Station nor WDM shows ads.

### Which is updated more often, Engineering Station or WDM?

Engineering Station ships an update every 27 months, and WDM every 9 days. Most recently, Engineering Station was updated on September 22, 2026 and WDM on August 2, 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.*