Comparison

D vs Challenge Coins

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

D

This app provides advanced control for a 12V accessory switch panel, allowing users to customize and manage vehicle lighting and other accessories via Bluetooth. It offers features like custom button programming, strobing patterns, and integration with vehicle signals for a seamless setup.

Highlights
  • Customizable 8-channel switch panel control
  • Dedicated backlight bus bar control
  • Group multiple outputs per button
  • Strobing patterns for outputs
  • Bluetooth connectivity with instant response
  • Integration with vehicle signals via trigger wires
  • Ignition wire for automatic activation/deactivation
Features
Read full description

Take your vehicle’s setup to the next level with the Diode Dynamics D-Switch. This advanced 8-channel switch panel gives you full, customized control over any 12V accessory that you want to wire up. And as you might have guessed, our engineers have also tailored it specifically to be the most functional and effective controller when it comes to your lighting setup. The D-Switch features four 30A outputs and four 15A outputs, putting it solidly into the "serious" category for total power delivery, but it’s packed with all kinds of other features to customize your setup! While there are many 8-button controllers on the market, the D-Switch stands apart with a 9th button dedicated to the backlight bus bar. The backlight bus provides eight extra outputs for your accent lights, allowing you to connect all of your backlit accessories without using up any of your main outputs. With just the press of a button, you can now activate all of your backlights at once! This is a game-changer for any rig with multiple lights installed. It’s also designed to give you complete control over your vehicle’s setup with eight customizable output channels. Unlike traditional switch panels that are one-to-one, meaning Channel 1 is always tied to Button 1, the D-Switch allows you to group and configure multiple output channels per button, allowing you to control multiple outputs with a single button. You can also power a single output with the different strobing patterns that are included. For example, you can program one button to strobe a light and another to run that same light at full power. Whether you're running Diode Dynamics off-road lighting or any other 12V accessories, the D-Switch allows you to customize each button to do exactly what you need. To activate and use the D-Switch, you can use the included controller, or control it using your phone with this app! Say goodbye to switch panel apps that lag, freeze, or don’t connect. The D-Switch Bluetooth app delivers instant response and easy programming with no loading screens or connection delays for a seamless and fast experience, every time. The D-Switch includes four trigger wires, along with a dedicated Ignition wire for added flexibility. This allows you to control your whole setup using vehicle signals, for a completely integrated experience. The ignition wire can be wired into an OEM ignition source and will activate the D-Switch when the ignition is turned on. It will also shut things down when the ignition is turned off. No need to manually turn your panel off! If you want to use any outputs without the ignition turned on, no worries - you can still turn the controller on manually at any time. The three trigger wires provide seamless integration with any of your vehicle’s 12V factory signals, such as high beams, fog lights, or reverse lights. This allows you to activate your outputs automatically–no buttons or switches. With some simple programming, your entire setup can operate like it’s fully integrated on your vehicle. Lastly, the Night Mode wire can be used to activate certain outputs, such as dimming outputs, or adjusting settings for low-light conditions. This trigger also adjusts the brightness of the controller’s backlighting automatically when driving at night. Built for extreme durability, the D-Switch features a solid-state design with no mechanical relays to wear out, or physical fuses to replace. The hub is encapsulated with an aluminum heatsink, ensuring superior heat dissipation. The D-Switch is IP67-rated for weather resistance and is backed by a 3-year limited warranty, ensuring long-term reliability and performance. Whether you're off-roading or on the road, it’s built to withstand whatever you throw at it.

About

Challenge Coins

Digitally catalog and share your challenge coin collection. This app allows you to scan and organize your acquired coins, making it easy to showcase your collection to others. Feedback is encouraged to improve the user experience.

Highlights
  • Scan and digitalize challenge coins
  • Organize coin collection
  • Share coin collection digitally
  • User feedback integration
Features
Read full description

This is the first edition of the Challenge Coins app. The first app that lets you scan and digitalize as well as share your collection of challenge coins that you have acquired. The idea came from seeing numerous books of challenge coins at USOs at airports and realizing that while it is enjoyable to collect the coins, it's difficult to share your collection with others. Please provide feedback on how this app can be made better. Thank you.

Screenshots

D4 screens
Challenge Coins3 screens

Verdict

The call

The clearest difference is rating: D at 3.7 against Challenge Coins's 2.3. D also leads on device support (3 vs 1) and iOS requirement (14.0 vs 26.2). Challenge Coins's advantage is update cadence (every 2 days vs monthly). On price, review sentiment, ratings volume and ads 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

D holds the better App Store score, 3.7 against 2.3. Both are backed by a comparable volume of ratings — 6 and 6 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

UpkeepUpdate frequency

D ships an update monthly, Challenge Coins every 2 days. Both last shipped on October 24, 2026.

Scorecard4 real differences · 6 level
D versus Challenge Coins: the parameters behind the verdict, then further details
ParameterDChallenge Coins
PriceFreeFree
Rating3.7 (6 ratings) — better2.3 (6 ratings)
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings66
Update frequencyMonthlyEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS14.0 — better26.2
Further details — not scored
Size29 MB7 MB
Age rating4+4+
DeveloperDiode Dynamics LLCPeter Weiss

Customer experience

D

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Challenge Coins

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

D

No in-app purchases

None

Challenge Coins

No in-app purchases

Questions

Is D free?
D is free to download, with no in-app purchases.
Is Challenge Coins free?
Challenge Coins is free to download, with no in-app purchases.
Which has better reviews, D or Challenge Coins?
D is rated higher. D averages 3.7 out of 5 from 6 ratings, while Challenge Coins averages 2.3 from 6 ratings.
Do D or Challenge Coins have ads?
Neither D nor Challenge Coins shows ads.
Which is updated more often, D or Challenge Coins?
D ships an update monthly, and Challenge Coins every 2 days. Most recently, D was updated on October 24, 2026 and Challenge Coins on October 24, 2026.

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