BLE Spy vs UI Tracer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BLE Spy
This utility allows users to discover, connect to, and interact with Bluetooth Low Energy devices. It offers standard features for browsing services and characteristics, alongside smart capabilities for customizing UUIDs and formatting data with JavaScript.
- Discover BLE devices
- Connect to multiple peripherals
- Browse services and characteristics
- Read and write characteristic values
- Log and export data to CSV
- Customize UUIDs
- Format characteristic data with JavaScript
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A professional utility to examine and control Bluetooth Low Energy devices. Apart from standard features BLE Spy has some unique capabilities in particular for developers. Standard features: • Find all Bluetooth Low Energy devices around you • Sort devices by name or rssi • Connect to multiple peripherals at the same time • Browse services and characteristics • Read and write characteristic values • Register for Notifications, log data and export to CSV Smart features: • Replace vendor specific UUIDs with a descriptive name • Add a description for characteristics • Format characteristic data with JavaScript BLE Spy requires iOS 11.
UI Tracer
This app allows developers to preview various SwiftUI view styles without recompiling code. It offers comparisons across multiple Apple platforms, including iOS, iPadOS, watchOS, tvOS, and macOS, streamlining the design process.
- Preview SwiftUI view styles
- Compare across iOS, iPadOS, watchOS, tvOS, macOS
- No recompilation needed
- Cross-platform code compatibility
- Extensible view library
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When you are developing your app using SwiftUI, it is really time consuming to compare all possible styles of buttons, list etc to choose one fits best. This app help you check all possible options for SwiftUI's views without recompiling. Compare how they look like on iOS, iPadOS, watchOS, tvOS and MacOS. Same code for all platforms where possible. The list of views will be extended.
Screenshots
Verdict
The clearest difference is review sentiment: UI Tracer at 100% against BLE Spy's 50%. UI Tracer also leads on update cadence (every 2 days vs every 8 months) and rating (5.0 vs 4.8). BLE Spy's advantage is in-app purchases (none vs 2) and chart position (#5 vs unranked). On ratings volume, ads and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
BLE Spy costs $4.99 and UI Tracer $2.99 up front. UI Tracer sells 2 one-off in-app purchases. BLE Spy asks for nothing beyond the download.
UI Tracer holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 4 and 4 respectively. Written reviews point the same way: 50% of BLE Spy's written reviews are positive against 100% of UI Tracer's.
BLE Spy ships an update every 8 months, UI Tracer every 2 days. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | BLE Spy | UI Tracer |
|---|---|---|
| Price | $4.99 | $2.99 — better |
| Rating | 4.8 (4 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 4 | 4 |
| Update frequency | Every 8 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Paid |
| Best chart rank | #5 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro — better |
| Requires iOS | 12.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 10 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Peter Gasche | Leonid Liadveikin |
Customer experience
BLE Spy
UI Tracer
In-app purchases
BLE Spy
No in-app purchases
UI Tracer
- Tip$0.99
- Donation$4.99
