Comparison

UAFX Control vs Zero Fret

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

Head to head
About

UAFX Control

This app enhances the functionality of Universal Audio's stompbox effects pedals. Users can customize pedal features, manage presets, and access new functionalities through firmware updates. It offers improved Bluetooth connectivity for faster and more reliable connections.

Highlights
  • Customize pedal features
  • Manage presets
  • Bluetooth connectivity
  • Firmware update support
  • OX Stomp editor
Read full description

UAFX Control is the companion application for Universal Audio's line of stompbox effects pedals. You can use the app to customize pedal features and more. What's New in v3.0.5 • Fixed slider value and slider responsiveness issues What's New in v3.0.4 • OX Stomp editor and preset improvements • Other minor fixes and enhancements What's New in v3.0.2 • Minor bug fixes and improvements What's New in v3.0.1 • Bluetooth redesigned for faster connections and rock-solid reliability • Support for new features in UAFX firmware version 2.0 • (OX Stomp) Off-Axis mic states are now correctly displayed Note that UAFX firmware updates are only available using the UA Connect desktop application, available at: uaudio.com/uafx/start

About

Zero Fret

This app provides a visual and haptic guitar and bass tuning experience. It displays string wobble and offers tactile feedback to guide tuning adjustments, supporting a wide range of instruments and custom tunings.

Highlights
  • Visual string wobble indicator
  • Haptic feedback for tuning guidance
  • Support for guitar, bass, ukulele, and more
  • Custom tuning creation and saving
  • Chromatic fallback tuning
  • Adjustable reference pitch
Features
Read full description

Zero Fret is a guitar and bass tuner you can see and feel. Pluck a string and watch it wobble on screen at the rate your string is beating against the right note. Turn the peg and the wobble slows; when it stops, you're in tune. On iPhone, turn on Feel the Beat and the phone taps once per beat in your hand, so you can keep your eyes on the pegs. • Guitar: Standard, Drop D, E-flat, D Standard, DADGAD, Open G, Open D, 7- and 8-string • Bass: 4-, 5- and 6-string • Ukulele (standard, low G, D, baritone), mandolin, mandola, banjo, violin and viola • Your own custom tunings, and favorites for one-tap switching • "Too slack, tighten" and "too tight, ease off": every reading says which way to turn • Chromatic fallback for notes that aren't one of your strings • Adjustable reference pitch, A = 410 to 470 Hz • Feel the Beat and the in-tune tick need a haptic engine: every supported iPhone has one, iPad does not • No accounts, ads, analytics or subscriptions • Works without a network connection • Free and open source: github.com/phall1/zero-fret Audio is processed live on your device. It is never recorded, stored or transmitted. The microphone runs only while Zero Fret is on screen and stops when you leave the app.

Screenshots

UAFX Control4 screens
Zero Fret4 screens

Verdict

The call

The clearest difference is rating: Zero Fret at 5.0 against UAFX Control's 2.0. Zero Fret also leads on ads (none vs shown) and update cadence (daily vs every 3 weeks). UAFX Control's advantage is ratings volume (27 vs 1) and iOS requirement (13.0 vs 17.0). On price, 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

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

Zero Fret holds the better App Store score, 5.0 against 2.0. That said, the two scores are not equally well evidenced: UAFX Control has 27 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

UAFX Control ships an update every 3 weeks, Zero Fret daily. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard6 real differences · 4 level
UAFX Control versus Zero Fret: the parameters behind the verdict, then further details
ParameterUAFX ControlZero Fret
PriceFreeFree
Rating2.0 (27 ratings)5.0 (1 ratings) — better
Positive reviews9.2% of reviews—
Number of ratings27 — better1
Update frequencyEvery 3 weeksDaily — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size60 MB2 MB
Age rating4+4+
DeveloperUniversal AudioPatrick Hall

Customer experience

UAFX Control

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews218 reviews
Positive9.2%
Neutral4.6%
Negative86.2%

Zero Fret

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

UAFX Control

Reported bugs

4 issues
  • App crashes after firmware updates
  • Pedals not detected or recognized by app
  • Registration process often fails
  • Bluetooth connection randomly drops

Requested features

4 requests
  • Ability to freely assign pedal buttons
  • Option to view and edit preset settings
  • MIDI support for preset changes
  • Landscape mode support on iPad

Zero Fret

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

UAFX Control

No in-app purchases

None

Zero Fret

No in-app purchases

Questions

Is UAFX Control free?
UAFX Control is free to download, with no in-app purchases.
Is Zero Fret free?
Zero Fret is free to download, with no in-app purchases.
Which has better reviews, UAFX Control or Zero Fret?
Zero Fret is rated higher. UAFX Control averages 2.0 out of 5 from 27 ratings, while Zero Fret averages 5.0 from 1 ratings.
Do UAFX Control or Zero Fret have ads?
UAFX Control shows ads; Zero Fret does not.
Which is updated more often, UAFX Control or Zero Fret?
UAFX Control ships an update every 3 weeks, and Zero Fret daily. Most recently, UAFX Control was updated on November 3, 2026 and Zero Fret on October 31, 2026.

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