Comparison

PolyTune vs Source Audio Neuro 3

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

Head to head
About

PolyTune

This application provides a powerful and accurate tuning tool for musicians. It allows for simultaneous tuning of all strings, supports various guitar and bass modes, and offers drop tunings. Its technology is based on a highly-regarded pedal tuner used by professionals.

Highlights
  • Tune all strings at once
  • Guitar/bass mode
  • Drop tunings support
  • Award-winning pedal technology
  • Chromatic tuning modes
  • High accuracy
Features
Read full description

It's the most powerful tool you've ever had in your pants! You know ... for tuning. That said, this is one of those nuggets on the App store you cannot afford to miss if you value being in tune and you take your smartphone with you when you go places. Yes to both? Then it's a no-brainer! - Tune all strings at once! Just strum your guitar, and see the pitch of all strings instantly. - Guitar/bass mode - Drop-tunings - 1:1 port of the award-winning PolyTune pedal (Guitar Player, Guitar World, Premier Guitar, MIPA, NAMM Best in Show 2010, etc.) - Based one the world’s best selling pedal tuner used by countless pros such as Steve Vai, John Petrucci, Steve Morse, Orianthi and many more! PolyTune is the world's first polyphonic tuner that will have future guitarists wondering how we ever got by without it. The magic lies in a never before seen approach to tuning aimed at speed, accuracy and ease of use, which allows you to get in tune fast, and back to doing what you love: playing. The PolyTune iPhone app is a 1:1 port of the award-winning PolyTune pedal tuner, and PolyTune for iPhone delivers exactly the same features and tuning technology as the pedal version. The pedal version is the fastest way to tune on-stage, whereas the iPhone app is the fastest and most convenient way to tune off-stage. Specifications: - Reference pitch from 435Hz to 445Hz - Drop tuning from E-flat to B - 0.5 cent accuracy - 2 chromatic tuning modes: Needle and Stream - MonoPoly recognizes whether one or several strings are played at once

About

Source Audio Neuro 3

Control and customize Source Audio's One Series guitar and bass effects pedals. Download thousands of presets, create your own unique sounds, and share them with a vibrant community of musicians. Seamlessly manage your pedal's effects from your mobile device or desktop.

Highlights
  • Download stage-ready presets
  • Create personalized effects sounds
  • Manage personal preset library
  • Share sounds with the community
  • Intuitive user interface
  • Cross-platform integration
Features
Read full description

Unlock the full potential of Source Audio's One Series line of guitar and bass effects pedals with Neuro 3. With over 10,000 presets crafted by both Source Audio and the Neuro Community, Neuro 3 empowers users to download stage-ready sounds directly to any One Series pedal. It also doubles as a potent effects editing tool, facilitating the creation of highly personalized sounds that can be loaded directly onto a pedal, stored in a personal preset library, or shared with the wider Neuro Community. Popular Neuro compatible One Series pedals include the Artifakt Lo-Fi Elements, Collider Delay+Reverb, C4 Synth, EQ2 Programmable Equalizer, and Ventris Dual Reverb. Neuro 3 is a top-to-bottom rewrite of the original Neuro app. It introduces a host of enhancements that include a sleek and intuitive user interface, streamlined preset downloading, advanced preset creation and management tools, and a seamless integration across mobile and desktop platforms. Additionally, it offers community-based features such as in-depth user profiles, public discussion forums accessible with every published preset, and the ability to Follow other Neuro Community members.

Screenshots

PolyTune4 screens
Source Audio Neuro 34 screens

Verdict

The call

The clearest difference is price: Source Audio Neuro 3 at Free against PolyTune's $4.99. Source Audio Neuro 3 also leads on rating (4.4 vs 2.8) and update cadence (every 4 weeks vs every 40 months). PolyTune's advantage is review sentiment (66% vs 21%) and iOS requirement (9.0 vs 16.0). On ratings volume, ads, 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

Source Audio Neuro 3 is free to download; PolyTune costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Source Audio Neuro 3 holds the better App Store score, 4.4 against 2.8. Both are backed by a comparable volume of ratings — 79 and 51 respectively. Written reviews complicate that: 66% of PolyTune's written reviews are positive against 21% of Source Audio Neuro 3's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

PolyTune ships an update every 40 months, Source Audio Neuro 3 every 4 weeks. The most recent releases landed on September 28, 2026 and September 23, 2026 respectively.

Scorecard6 real differences · 4 level
PolyTune versus Source Audio Neuro 3: the parameters behind the verdict, then further details
ParameterPolyTuneSource Audio Neuro 3
Price$4.99Free — better
Rating2.8 (79 ratings)4.4 (51 ratings) — better
Positive reviews65.7% of reviews — better21.4% of reviews
Number of ratings79 — better51
Update frequencyEvery 40 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS9.0 — better16.0
Further details — not scored
Size45 MB284 MB
Age rating4+4+
DeveloperTC ElectronicSource Audio

Customer experience

PolyTune

All ratings79 ratings
Positive41.8%
Neutral6.3%
Negative51.9%
Written reviews513 reviews
Positive65.7%
Neutral9.6%
Negative24.8%

Source Audio Neuro 3

All ratings51 ratings
Positive82.4%
Neutral9.8%
Negative7.8%
Written reviews98 reviews
Positive21.4%
Neutral10.2%
Negative68.4%

User reviews

PolyTune

From 79 App Store ratings

What we love

  • 🩵 Works really well
  • 💯 Accurate and precise
  • 🔢 Polyphonic tuning mode
  • 🎨 Customizable display colors
  • 🔌 Works with electric and acoustic guitars

Room to improve

  • 🐛 Crashes or freezes on newer iOS versions
  • 🔇 Struggles to pick up low strings or in noisy environments
  • ⏱️ Screen dims during use
  • 🚫 No support for alternate/custom tunings
  • 💤 Drains battery quickly when running in background

Source Audio Neuro 3

From 51 App Store ratings

What we love

  • 💡 Innovative and versatile pedals
  • 👍 Easy to use (for some)
  • ✨ Unlocks pedal potential
  • 🚀 Works well on desktop
  • 🎶 Great sound quality

Room to improve

  • 🐛 Frequent connection issues
  • 🐛 App crashes frequently
  • 🐛 Unintuitive interface
  • 🐛 Loss of precision in values
  • 🐛 Old version missed

Bugs and requests

PolyTune

Reported bugs

3 issues
  • Crashes on launch
  • Unable to detect or tune certain strings
  • Inaccurate tuning readings

Requested features

4 requests
  • Add support for 432Hz tuning
  • Implement custom tuning options
  • Improve compatibility with external audio interfaces
  • Add a dedicated on/off switch

Source Audio Neuro 3

Reported bugs

57 issues
  • Settings not reflected in EQ2
  • Won't connect to pedal even at max volume
  • No connection with iPhone 11
  • App kills battery and overheats phone
  • Latest update broke app on iPad, crashes on open
Show 52 more
  • App will not let user create an account
  • Bluetooth connectivity issues remain
  • Editing aspects don't work or barely work
  • Most level settings don't have a proper zero
  • App continues to be a bag of bugs
  • App freezes on sign-in screen
  • App crashes instantly after login
  • Update broke TRS functionality
  • App no longer connects to pedal
  • Nemesis Delay integration no longer works, cannot change parameters without PC
  • Cannot login after password update
  • App doesn't load on iMac
  • Cannot connect pedals to iPhone
  • App still says disconnected despite Bluetooth sync
  • TRS cable won't connect to Ventris with iPhone
  • Cannot preview community presets without loading them
  • C4 pedal not recognized by current app version
  • USB connection to Ventris is unreliable, repeatedly disconnects
  • Tiny grey lettering against grey background for knob labels
  • App no longer capable of sending effects
  • Desktop app crashes when trying to log in
  • Unable to create an account, throws an error
  • Cannot change presets with provided cable
  • App keeps crashing
  • Presets do not work
  • Real-time editing or choosing a preset on the pedal isn't possible for C4
  • iOS app crashes every time it's used
  • Cannot figure out if presets are being saved
  • Cannot modify preset names
  • App crashes before finding C4 support
  • App will not calibrate sound
  • Cannot browse or search the preset library, endlessly displays loading animation
  • App doesn't work on Apple tablet, requires individual USB connection
  • App would not connect after initial use
  • App interface is clunky and not properly developed
  • Presets don't work, makes weird sound and doesn't load
  • No success cycling through presets
  • Cannot connect with the app
  • Error message about not being able to find a host name when creating an account
  • Desktop version tells user to use mobile version to create account
  • Half the time community presets won't load
  • Desktop app sometimes won't let you preview presets
  • Cannot edit preset names on phone
  • Headphone volume needs to be MAX for connection
  • Login requirement is extremely annoying
  • UI is really bad, BPM text entry doesn't save
  • Cannot enter hardware settings with updated app
  • Forgot password doesn't send reset email
  • Cannot make any changes to pedals with the app
  • No problems with iPad 2
  • LED is always red since latest firmware update
  • Internet connection error despite Wi-Fi

Requested features

19 requests
  • Tutorials for guitar players on programming synthesizers
  • Optimization improvements for the app
  • More intuitive GUI
  • Restore horizontal sliders and full 8-bit resolution
  • Add USB connection option
Show 14 more
  • Improve UI for easier parameter adjustment
  • Add +/- buttons for fine-tuning parameters
  • Allow for arbitrary setting of increment/decrement values for buttons
  • Enable continuous change with long-press on buttons
  • Implement gesture-based control similar to video playback
  • Allow users to rename presets
  • Add ADSR controls for synths
  • Make password reset automated
  • Update online tutorials to match current interface
  • Develop an iPad-specific app with desktop-like functionality
  • Improve reliability of USB connectivity
  • Make app usable without internet connection for library access
  • Allow knob adjustments on the pedal to reflect in the app
  • Fix bug where negative numbers cannot be input on iPhone

In-app purchases

None

PolyTune

No in-app purchases

None

Source Audio Neuro 3

No in-app purchases

Questions

Is PolyTune free?
PolyTune costs $4.99, with no in-app purchases.
Is Source Audio Neuro 3 free?
Source Audio Neuro 3 is free to download, with no in-app purchases.
Which has better reviews, PolyTune or Source Audio Neuro 3?
Source Audio Neuro 3 is rated higher. PolyTune averages 2.8 out of 5 from 79 ratings, while Source Audio Neuro 3 averages 4.4 from 51 ratings.
Do PolyTune or Source Audio Neuro 3 have ads?
Neither PolyTune nor Source Audio Neuro 3 shows ads.
Which is updated more often, PolyTune or Source Audio Neuro 3?
PolyTune ships an update every 40 months, and Source Audio Neuro 3 every 4 weeks. Most recently, PolyTune was updated on September 28, 2026 and Source Audio Neuro 3 on September 23, 2026.

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