# eFmFm vs WD Supervisor

eFmFm and WD Supervisor are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

eFmFm ships an update every 5 weeks, WD Supervisor monthly. The most recent releases landed on May 15, 2026 and August 31, 2026 respectively.

## The numbers

| Metric | eFmFm | WD Supervisor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Size | 51 MB | 38 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Newt Global Future Ventures, LLC](https://appshunter.io/developer/984640672) | [WhistleDrive Pvt Ltd](https://appshunter.io/developer/1475468820) |

## What reviewers say

### eFmFm

[App page](https://appshunter.io/ios/app/efmfm-driver/id1560673513)

**In-app purchases:** none


### WD Supervisor

[App page](https://appshunter.io/ios/app/wd-supervisor/id6495973148)

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

**In-app purchases:** none


## Frequently asked questions

### Is eFmFm free?

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

### Is WD Supervisor free?

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

### Do eFmFm or WD Supervisor have ads?

Neither eFmFm nor WD Supervisor shows ads.

### Which is updated more often, eFmFm or WD Supervisor?

eFmFm ships an update every 5 weeks, and WD Supervisor monthly. Most recently, eFmFm was updated on May 15, 2026 and WD Supervisor on August 31, 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.*