# KDM Inspector vs Microsoft Surface

The clearest difference is review sentiment: KDM Inspector at 100% against Microsoft Surface's 26%. KDM Inspector also leads on rating (4.0 vs 3.2). Microsoft Surface's advantage is price (Free vs $2.99) and update cadence (every 2 months vs every 38 months). On ads, in-app purchases and device support there is nothing between them.

Microsoft Surface is free to download; KDM Inspector costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

KDM Inspector holds the better App Store score, 4.0 against 3.2. That said, the two scores are not equally well evidenced: Microsoft Surface has 159 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of KDM Inspector's written reviews are positive against 26% of Microsoft Surface's.

KDM Inspector ships an update every 38 months, Microsoft Surface every 2 months. The most recent releases landed on September 30, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | KDM Inspector | Microsoft Surface |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/kdm-inspector/id837578321/reviews)** | [3.2 (159 ratings)](https://appshunter.io/ios/app/microsoft-surface/id1476329686/reviews) |
| Number of ratings | 1 | **159** |
| Positive reviews | **100.0% of reviews** | 25.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 70 MB |
| Requires iOS | 17.0 | **11.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jonathan Judelson](https://appshunter.io/developer/813495416) | [Microsoft Corporation](https://appshunter.io/developer/298856275) |

## What reviewers say

### KDM Inspector

[App page](https://appshunter.io/ios/app/kdm-inspector/id837578321)

This utility app helps professionals working with Digital Cinema Packages (DCPs) and KDM encryption keys. It allows users to quickly open and view essential key information directly from their iOS device, supporting various file formats.

**Highlights:** Open KDM keys from email, View key active and expiration times, See show player public key and UUID, Supports .xml and .zip KDM files, Mobile DCP/KDM management

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

**In-app purchases:** none


### Microsoft Surface

[App page](https://appshunter.io/ios/app/microsoft-surface/id1476329686)

Manage and personalize your audio devices. Update firmware, view device information, and adjust settings like equalizer and volume. Connect and control devices, and access tutorials for assistance.

**Highlights:** Update earbuds and headphones, View and change device info, View battery and volume, Personalize settings, Change equalizer settings, Control connected devices, Reset devices

**In-app purchases:** none

**What reviewers like**

- 🎵 Excellent audio quality and crisp sound
- 🎚️ Useful EQ customization capabilities
- 📱 Smooth out-of-box setup experience
- 🔗 Hardware quality is solid
- ⚡ Quick app loading when functional

**What reviewers complain about**

- 🐛 App frequently fails to detect paired headphones
- 🔌 Constant connection and pairing issues
- 😤 Poor reliability and stability
- 🚫 App becomes completely broken after updates
- 🔐 Authentication and login failures

**Reported bugs**

- App stuck on scanning/searching for headphones
- Bluetooth connection drops during calls
- App won't recognize headphones even when paired
- Authentication hangs on 'Authenticating' screen
- Constant red light indicator issues

**Requested features**

- MacOS app support
- iPad landscape mode support
- Customizable gesture controls
- Better device switching between paired devices
- More EQ preset options


## Frequently asked questions

### Is KDM Inspector free?

KDM Inspector costs $2.99, with no in-app purchases.

### Is Microsoft Surface free?

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

### Which has better reviews, KDM Inspector or Microsoft Surface?

KDM Inspector is rated higher. KDM Inspector averages 4.0 out of 5 from 1 ratings, while Microsoft Surface averages 3.2 from 159 ratings.

### Do KDM Inspector or Microsoft Surface have ads?

Neither KDM Inspector nor Microsoft Surface shows ads.

### Which is updated more often, KDM Inspector or Microsoft Surface?

KDM Inspector ships an update every 38 months, and Microsoft Surface every 2 months. Most recently, KDM Inspector was updated on September 30, 2026 and Microsoft Surface on October 8, 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.*