GPX Builder vs DTrol
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GPX Builder
This utility app allows developers to simulate and record real-world GPS location data for testing purposes. Adjust location settings for accuracy and battery life, then export data as GPX or GeoJSON files. Includes carrier and connectivity data for comprehensive testing.
- Simulate GPS location data
- Record real-world GPS tracks
- Adjust location accuracy
- Export as GPX or GeoJSON
- Include carrier and connectivity data
- Create custom test routes
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*Continued use of GPS running in the background can dramatically decrease battery life. Developing apps that require location services can be a challenge when the data you receive in the simulator is so much different than what a device receives in the real world. Are your location settings battery friendly enough to solve the problem you are working on or could you do with a little less accuracy? GPX Builder allows you to adjust the settings of the location services to match your project, then record real location data as you create your own test routes for your simulator. You can name each route and email the GPX data back to your development team. We now include carrier and connectivity data so you can generate GPX or GeoJSON files with real world data for unreliable connectivity. We hope this will help you to understand your user's experience better so you can create amazing features. You can export your location data as a GPX file or in GeoJSON format. Points are recorded at a rate of one per second to match the playback speed of the iOS Simulator and give more realistic results when simulating location data. You can still record raw data only by choosing that option in the settings.
DTrol
Control NAD processors and receivers remotely via WiFi. Manage power, volume, mute, source selection, and tuner presets across multiple zones. Customize settings and launch source apps for a seamless audio-visual experience.
- Power control
- Volume adjustment
- Mute function
- Source selection
- Tuner presets
- Multi-zone support
- User customization
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DTrol turns your iPhone and iPad into a fast, reliable, two-way remote for your network-connected NAD and Anthem A/V processors and receivers — controlling power, mute, volume, source, and tuner presets on all your zones. That's it — and that's probably all you need most of the time. DTrol is a zone controller: it focuses on the functions you reach for every day and does them well — just like remotes used to be. **Control Every Zone** Power, mute, volume, source, and tuner presets — zone by zone, across multiple processors and receivers. **Make It Yours** Rename zones and sources, adjust their details, and set up links that launch your source apps. Changes live in DTrol only — nothing on your equipment is modified. **Two-Way and Live** DTrol shows the real state of your equipment, not just the last button you pressed. It stays in sync with what's playing and lets you know if a device stops responding. **Direct and Private** DTrol talks to your equipment directly over your home network. There's no account, nothing in the cloud, and no personal data collected. Your setup stays on your device. **Your Setup Carries Over** Upgrading from an earlier version of DTrol? Your servers, zones, and settings come with you automatically — nothing to set up again. **Supports** - Known to support: NAD T175, T175 HD, T765, T775, T785, T187, T777, M15, M15 HD; Anthem AVM 50v and Statement D2v (and variants - the legacy AVM control protocol) - Designed to also support: NAD T755; Anthem AVM 20, AVM 30, AVM 40, AVM 50 - Likely supports other models that speak the same NAD or Anthem legacy protocols - Your processor or receiver must be reachable on your home network — via its Ethernet port if it has one, or through a device that bridges your network to its RS-232 port, such as the Global Caché iTach IP2SL, iTach WF2SL, or Flex - Controlled devices must have a static IP address — this keeps DTrol fast and stable. If a device's IP address changes, re-add it in DTrol. - For more help with network configuration, see the support page: https://dtrol.fastfiveproducts.com/ **Setup** With your processor/receiver and your iPhone or iPad on the same network, tap "+" in DTrol to add your equipment as a DTrol "Server" — you'll need its static IP address and port. DTrol queries the device and sets up your Zones and Sources automatically; afterward you can adjust Zone names, Source names, and other details in Settings. DTrol is free. It requires iOS 18 and a local-network connection to your equipment. DTrol and its author have no affiliation with NAD Electronics, an international division of Lenbrook Industries Limited ("NAD"), or with Anthem. This app is not endorsed by, supported by, or in any other way connected with NAD or Anthem. NAD and Anthem are trademarks of their respective owners.
Screenshots
Verdict
The clearest difference is price: DTrol at Free against GPX Builder's $0.99. DTrol also leads on rating (5.0 vs 3.8) and ads (none vs shown). GPX Builder's advantage is ratings volume (4 vs 1) and iOS requirement (15.5 vs 18.0). On update cadence, in-app purchases and device support 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
DTrol is free to download; GPX Builder costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
DTrol holds the better App Store score, 5.0 against 3.8. Both are backed by a comparable volume of ratings — 4 and 1 respectively.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 29, 2026 and October 17, 2026 respectively.
| Parameter | GPX Builder | DTrol |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 3.8 (4 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 2 months | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.5 — better | 18.0 |
| Further details — not scored | ||
| Size | 7 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | OurBigAdventure, LLC | Fast Five Products LLC |
Customer experience
GPX Builder
DTrol
In-app purchases
GPX Builder
No in-app purchases
DTrol
No in-app purchases









