Comparison

FORScan Viewer vs Medusa Interface for Hydra

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

Head to head
About

FORScan Viewer

This application allows users to read and view information about the on-board network of Ford, Mazda, Lincoln, and Mercury vehicles. It supports various OBD adapters and displays diagnostic trouble codes for all modules.

Highlights
  • Read vehicle on-board network configuration
  • View Diagnostic Trouble Codes (DTC)
  • Supports Ford, Mazda, Lincoln, Mercury vehicles
  • Compatible with OBDLink MX+, vLinker adapters
  • Displays module information
Features
Read full description

FORScan Viewer is an application that allows users to connect to a compatible OBD adapter and view information about the on-board network of Ford, Mazda, Lincoln and Mercury vehicles. FORScan Viewer is an independent third-party application and is not affiliated with, endorsed by, sponsored by, or approved by Ford Motor Company, Mazda Motor Corporation, or their affiliated brands. Ford, Lincoln, Mercury, and Mazda are trademarks of their respective owners and are used solely to describe vehicle compatibility. The application communicates only with compatible third-party OBD-II adapters owned and operated by the user. The application does not control, modify, or operate any equipment manufactured by Ford, Mazda, Lincoln, or Mercury. SUPPORTED OBD ADAPTERS - OBDLink MX+ (recommended) - vLinker FS Bluetooth (recommended) - vLinker FD BLE (recommended) - other ELM327-compatible WiFi or BLE adapter (not recommended). Attention! Some ELM327 adapters are not fully compatible with this application and may not work properly. COMPATIBILITY FORScan Viewer is designed to display information for the following vehicles: Ford, Lincoln, Mercury: 1996-2022 models, some 1994-1995 models - Mazda: 1996-2022 models. Important note: Mazda 7G models (new Mazda 3, CX-30, MX-30, CX-50, etc) have limited or no support! - Other vehicle manufacturers are NOT supported FEATURES - Reading and displaying information about the on-board network configuration of the connected vehicle (modules), including Diagnostic Trouble Codes (DTC) for all modules - More functions are available in FORScan Lite LEGAL NOTICE FORScan Viewer does not contain proprietary vehicle software, firmware, service manuals, or other copyrighted materials owned by vehicle manufacturers. Vehicle data displayed by the application is obtained through standard diagnostic interfaces and user-authorized connections.

About

Medusa Interface for Hydra

Control your vehicle's Hydra Chip wirelessly via Bluetooth. Switch between different performance tunes instantly from your phone, customize tune names, and manage multiple devices. A demo mode is available to explore features without hardware.

Highlights
  • Bluetooth control for Hydra Chip
  • Quick tune switching
  • Customizable tune names
  • Multi-device memory
  • Demo Mode
Features
Read full description

Medusa Interface for Hydra puts full Bluetooth control of your Power Hungry Performance Hydra Chip right in your pocket. Pair your phone with the Medusa module over Bluetooth and switch between your loaded tune positions in seconds — no extra tools, no cables. Whether you're heading to the track, towing a heavy load, or just cruising, you can change your Hydra's active position on the fly. FEATURES • Bluetooth control — connect wirelessly to your Medusa module and command your Hydra Chip from your phone. • Quick tune switching — move between Bypass and each of your loaded positions with a single tap. • Custom position names — rename every position to match your own tunes, so you always know exactly what's loaded. Names are saved separately for each Medusa device. • Multi-device memory — the app remembers your Medusa module(s) and automatically reconnects to the closest one the next time you open it. • Demo Mode — explore the full app and see how it works without a device connected. A Power Hungry Performance Hydra Chip and Medusa module are required to use this app with your vehicle. Power Hungry Performance www.gopowerhungry.com

Screenshots

FORScan Viewer4 screens
Medusa Interface for Hydra3 screens

Verdict

The call

The clearest difference is review sentiment: Medusa Interface for Hydra at 100% against FORScan Viewer's 32%. Medusa Interface for Hydra also leads on rating (5.0 vs 2.7) and update cadence (monthly vs every 3 months). FORScan Viewer's advantage is ratings volume (105 vs 3) and iOS requirement (9.0 vs 15.0). On price, ads, in-app purchases 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

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

Medusa Interface for Hydra holds the better App Store score, 5.0 against 2.7. That said, the two scores are not equally well evidenced: FORScan Viewer has 105 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 32% of FORScan Viewer's written reviews are positive against 100% of Medusa Interface for Hydra's.

UpkeepUpdate frequency

FORScan Viewer ships an update every 3 months, Medusa Interface for Hydra monthly. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 5 level
FORScan Viewer versus Medusa Interface for Hydra: the parameters behind the verdict, then further details
ParameterFORScan ViewerMedusa Interface for Hydra
PriceFreeFree
Rating2.7 (105 ratings)5.0 (3 ratings) — better
Positive reviews31.6% of reviews100.0% of reviews — better
Number of ratings105 — better3
Update frequencyEvery 3 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better15.0
Further details — not scored
Size80 MB56 MB
Age rating4+4+
DeveloperAleksei SavinPOWER HUNGRY PERFORMANCE, INC.

Customer experience

FORScan Viewer

All ratings104 ratings
Positive34.6%
Neutral18.3%
Negative47.1%
Written reviews98 reviews
Positive31.6%
Neutral5.1%
Negative63.3%

Medusa Interface for Hydra

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

Bugs and requests

FORScan Viewer

Reported bugs

8 issues
  • App fails to detect OBD2 adapters despite successful pairing
  • Bluetooth connection drops and fails to reconnect
  • WiFi adapter detection not working after updates
  • Error code clearing functionality non-functional
  • Vehicle identification fails on certain models
Show 3 more
  • App crashes during connection attempts
  • Permission settings not persisting correctly
  • Incompatibility with specific adapter models (iCar Pro, Vgate, etc.)

Requested features

8 requests
  • Bluetooth Low Energy (BLE) adapter support
  • Full feature parity between iOS and Windows versions
  • Turkish language support
  • Improved UI scaling for modern iPhones
  • Expanded vehicle compatibility
Show 3 more
  • Programming capabilities in iOS version
  • Better adapter compatibility documentation
  • Support for non-Ford vehicle manufacturers

Medusa Interface for Hydra

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

FORScan Viewer

No in-app purchases

None

Medusa Interface for Hydra

No in-app purchases

Questions

Is FORScan Viewer free?
FORScan Viewer is free to download, with no in-app purchases.
Is Medusa Interface for Hydra free?
Medusa Interface for Hydra is free to download, with no in-app purchases.
Which has better reviews, FORScan Viewer or Medusa Interface for Hydra?
Medusa Interface for Hydra is rated higher. FORScan Viewer averages 2.7 out of 5 from 105 ratings, while Medusa Interface for Hydra averages 5.0 from 3 ratings.
Do FORScan Viewer or Medusa Interface for Hydra have ads?
Neither FORScan Viewer nor Medusa Interface for Hydra shows ads.
Which is updated more often, FORScan Viewer or Medusa Interface for Hydra?
FORScan Viewer ships an update every 3 months, and Medusa Interface for Hydra monthly. Most recently, FORScan Viewer was updated on November 2, 2026 and Medusa Interface for Hydra on October 31, 2026.

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