# UDevice vs Keylines

The clearest difference is price: Keylines at Free against UDevice's $4.99. Keylines also leads on rating (5.0 vs 4.4). UDevice's advantage is in-app purchases (none vs 1) and ratings volume (36 vs 1). On ads, monetization model, device support and iOS requirement there is nothing between them.

Keylines is free to download; UDevice costs $4.99 up front. Keylines sells 1 one-off in-app purchase. UDevice asks for nothing beyond the download.

Keylines holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: UDevice has 36 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | UDevice | Keylines |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.4 (36 ratings)](https://appshunter.io/ios/app/udevice-dev-assistant/id1608053878/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/keylines/id6443838591/reviews)** |
| Number of ratings | **36** | 1 |
| Positive reviews | 78.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Monetization | Free | Free |
| Best chart rank | **#4** | — |
| Size | 159 MB | 2 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gansu Zhenxian Network Technology Co., Ltd.](https://appshunter.io/developer/1616881226) | [明亮 李](https://appshunter.io/developer/1649800454) |

## What reviewers say

### UDevice

[App page](https://appshunter.io/ios/app/udevice-dev-assistant/id1608053878)

**Currently charting:** #4 Top Paid · Developer Tools, #69 Top Grossing · Developer Tools (US App Store)

This app offers a comprehensive suite of developer and testing tools. It includes network utilities like HTTP(s) capture and DNS parsing, alongside system information and file management capabilities. Ideal for development, testing, and device management.

**Highlights:** HTTP(s) Capture/Rewrite, SSH and Terminal access, Python3 interpreter, Cookie editing, Network utilities (Ping, DNS, Traceroute, Port Scan), File manager, Device fingerprinting and system info

**Features:** macOS Compatibility, Safari Extension, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Keylines

[App page](https://appshunter.io/ios/app/keylines/id6443838591)

Overlay a customizable grid on screenshots to accurately measure layout dimensions, margins, and padding. This tool streamlines design and development workflows by enabling detailed analysis of app interfaces.

**Highlights:** Screenshot grid overlay, Measure layout sizes, Analyze margins and padding, Customizable grid size, Customizable line colors, Speeds up design process

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Use Pixel as Coordinates | $0.99 | one-time |


## Frequently asked questions

### Is UDevice free?

UDevice costs $4.99, with no in-app purchases.

### Is Keylines free?

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

### Which has better reviews, UDevice or Keylines?

Keylines is rated higher. UDevice averages 4.4 out of 5 from 36 ratings, while Keylines averages 5.0 from 1 ratings.

### Do UDevice or Keylines have ads?

Neither UDevice nor Keylines shows ads.

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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.*