Comparison

Code vs PowerVision 4

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

Head to head
About

Code

Diagnose Harley-Davidson motorcycle issues directly from your iPhone. Access detailed code descriptions, view diagnostic videos, and monitor live sensor data. Save and retrieve your code history for advanced troubleshooting.

Highlights
  • Read Harley-Davidson trouble codes
  • Detailed code descriptions
  • Diagnostic videos
  • Live sensor data
  • Save/retrieve code history
Features
Read full description

Read Harley-Davidson® trouble codes with your iPhone! Code:READ from Vance & Hines makes your iPhone one of the most powerful code readers available. Detailed code descriptions, diagnostic videos for common codes, live sensor data, and the ability to save/retrieve code history bring advanced diagnostic capabilities to you. ("Harley-Davidson" is a registered trademark of Harley-Davidson Motor Company.)

About

PowerVision 4

Control your motorcycle's engine performance directly from your iPhone. Access hundreds of pre-loaded engine tunes or create custom ones. Easily flash tunes to your bike's ECU, monitor real-time engine data, and manage diagnostic trouble codes.

Highlights
  • Flash tunes to ECU
  • Access vast tune database
  • Record real-time engine data
  • Read/clear diagnostic codes
  • Remote tuning optimization
  • Autotune modes
  • Active tests for diagnostics
Features
Read full description

Power Vision 4 from Dynojet Research Inc. combined with your iPhone puts you in control of your bike’s engine. Gain access to hundreds of different tunes for various aftermarket components and easily flash any of them to you bike’s ECU. Unbelievably quick and easy to use; make more power and torque with the push of a button. Advanced users can edit hundreds of individual engine parameters to build a tune that’s dialed in for their unique setup using Dynojet’s integrated cloud tune delivery system. With the PV4 App and our pocket-sized PV4 device you can: • Flash tunes to your ECU – no setup required, just create an account, select your tune, flash, and ride the ultimate ride. • Access to vast database of pre-loaded tunes for different configurations – no custom tuning required. • Easily download and manage pre-loaded and custom tunes. • Record real-time engine data and review in WinPEP 8 Data Center. • Read, review, clear, and share diagnostic trouble codes (DTC’s) with built-in descriptions. • Flash an unlimited number of bikes with one device.* • Use licenses from your Power Vision Classic with your Power Vision 4. • Return to stock at any time – your original, factory tune is safely backed up on the cloud and on your phone. • Optimized for remote-tuning. – Easily ride, record, and share data logs with your tuner for trouble-free custom tuning without a dynamometer. • Keep your ECU – The Power Vision 4 reprograms your bike without having to remove or mail-in the ECU. Just plug into the diagnostic connector and flash, it’s really that easy. • Autotune - Choose from three different Autotune modes to dial your HD motorcycle in the way that fits you best. • Dynamometer Compatible - Plug your PV4 directly into your Dynojet Dynamometer to view channels, flash, read diagnostic information, read RPM via OBD, and load control without an inductive pickup. • Flashes on HD motorcycles as fast as 12.75 seconds (select models) • Active Tests help diagnose problems on your HD - cycle the fuel pump, indicators, water pump, and many other components when troubleshooting engine or electrical issues. • Diagnostic Routines allow you to bleed the ABS system at home World class, US-based customer service from our team of motorcycle enthusiasts is also available to suggest the best tune, review data recordings, or assist in troubleshooting. Your ultimate ride awaits with Power Vision 4 – download the app and see how easy tuning can be! * First bike license included with purchase of Power Vision 4 device. Requires purchase of license for each additional bike DISCLAIMER: Not legal for sale or use in California

Screenshots

Code3 screens
PowerVision 44 screens

Verdict

The call

The clearest difference is rating: PowerVision 4 at 4.9 against Code's 4.0. PowerVision 4 also leads on ratings volume (310 vs 5). Code's advantage is iOS requirement (10.0 vs 15.0). On price, review sentiment, update cadence 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. Code sells 1 one-off in-app purchase and PowerVision 4 sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

PowerVision 4 holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: PowerVision 4 has 310 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 75% of Code's written reviews are positive against 78% of PowerVision 4's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

Scorecard3 real differences · 7 level
Code versus PowerVision 4: the parameters behind the verdict, then further details
ParameterCodePowerVision 4
PriceFreeFree
Rating4.0 (5 ratings)4.9 (310 ratings) — better
Positive reviews75.0% of reviews77.9% of reviews — better
Number of ratings5310 — better
Update frequencyMonthlyMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better15.0
Further details — not scored
Size74 MB103 MB
Age rating4+4+
DeveloperVance & HinesDynojet

Customer experience

Code

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

PowerVision 4

All ratings310 ratings
Positive98.1%
Neutral1.0%
Negative1.0%
Written reviews163 reviews
Positive77.9%
Neutral8.0%
Negative14.1%

Bugs and requests

Code

Not enough reviews yet to summarise bugs or requests.

PowerVision 4

Reported bugs

4 issues
  • App crashes when using diagnostic functions
  • Bluetooth disconnects during tuning process
  • Sensor readings not updating correctly
  • Tune flashing fails intermittently

Requested features

5 requests
  • Add more pre-loaded tune options
  • Implement an auto-tune feature
  • Improve data logging and cloud integration
  • Expand support for wider range of bikes
  • Enhance live sensor data display

In-app purchases

1 purchases

Code

One-time1
  • Code:READ Premium$0.99
8 purchases

PowerVision 4

One-time8
  • Universal Token$10.00
  • Universal Token (3x)$30.00
  • Universal Token (5x)$50.00
Show 5 more
  • Universal Token (10x)$100.00
  • Universal Token (15x)$150.00
  • Universal Token (20x)$200.00
  • Universal Token (25x)$250.00
  • Universal Token (30x)$300.00

Questions

Is Code free?
Code is free to download, with in-app purchases available.
Is PowerVision 4 free?
PowerVision 4 is free to download, with in-app purchases available.
Which has better reviews, Code or PowerVision 4?
PowerVision 4 is rated higher. Code averages 4.0 out of 5 from 5 ratings, while PowerVision 4 averages 4.9 from 310 ratings.
Do Code or PowerVision 4 have ads?
Neither Code nor PowerVision 4 shows ads.
Which is updated more often, Code or PowerVision 4?
Code ships an update monthly, and PowerVision 4 monthly. Most recently, Code was updated on October 1, 2026 and PowerVision 4 on October 12, 2026.

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