Comparison

Fretronome vs FAC Phazer

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

Head to head
About

Fretronome

This app helps guitarists learn fretboard notes and intervals. It visually displays notes and intervals on a fretboard and includes a quiz mode to test knowledge. Support for left-handed players is also available.

Highlights
  • Fretboard note and interval learning
  • Visual note/interval display
  • Quiz mode for skill testing
  • Left-handed guitarist support
Features
Read full description

Fretronome is designed for guitarists to support them in learning the notes and intervals on a guitar fretboard. It's pretty simple, with the first button press it selects a note or interval on the fretboard, with the second it displays the name of the note or interval. It also contains a basic quiz mode where you can test your skills Support for left-handed guitarists (Fretronome settings in the iOS settings app)

About

FAC Phazer

This music effect plugin offers a rich sonic palette inspired by classic guitar pedals and hardware synthesizers. It provides extensive control over phasing effects with adjustable LFOs, unique characters, and versatile modulation options for all instruments and genres.

Highlights
  • Inspired by classic phaser units
  • Adjustable LFO with tempo sync
  • Four unique sonic characters
  • External modulation and Step mode
  • Stereo phase modulation
  • Universal AUv3 purchase
Features
Read full description

• Inspired by famous phaser units from guitarist and keyboardist world • Unique sonic character combined with a large amount of control • Adjustable LFO; diverse waveforms and synchronizable to host tempo • Versatile: External modulation (parameters), Step mode, and more • Unique Butterfly Meter: Shows LFO modulation and output level • Suitable for all musical genres and instruments • Stereo, adjustable phase modulation distance between both channels • Includes various presets for inspiration • Advanced Responsive Design, portrait and landscape views • Universal Purchase: AUv3 for iOS (iPad/iPhone), macOS and Vision Pro FAC Phazer will satisfy most fans of phasing effects, seducing them with its rich sonic palette and elegant interface. To achieve the classic phase effect, the original signal is blended with a slightly out-of-phase copy of itself. Altering the timing difference between the two signals produces the swooshing sound characteristic of phasing. Most phaser units available on the market are built around this circuit topology, each with its own specificities and limitations. Guitar pedals provide a great sonic signature out of the box and are a great source of inspiration, but we often overlook the impressive built-in effects sections of some hardware synthesizers. FAC Phazer combines the best of both worlds into a single plugin, offering access to all parameters involved in crafting the phasing effect. The design and development were inspired by both pedals and built-in phaser effects found in hardware synthesizers. This led to the creation of four unique characters: Classic, Midori, Step, and Tirus. All parameters can be applied to each of these characters, allowing you to create new, exciting, and outstanding sounds. The presets Slow, Moderate, and Jumpy Phase Pedal or also Fleur d’Oranger bring the classic pedals sound signature within your reach. If you're seeking more modern characteristics, the Step Sound I preset offers a splendid stepping mode, while the Midori Phase Shift II preset emphasizes the feedback in a unique way. On the other hand, the Tirus Anthem preset is an excellent starting point for exploring phasing effects produced with built-in synthesizer effects. An important aspect that strongly contributes to the variety of the sonic palette provided by the plugin is the modulation options. The LFO can run in free mode, be synchronized to the host tempo, or be defined by external automation parameters. The documentation is available at fredantoncorvest.com/FAC_Phazer.html

Screenshots

Fretronome4 screens
FAC Phazer3 screens

Verdict

The call

The clearest difference is rating: FAC Phazer at 5.0 against Fretronome's 3.7. FAC Phazer also leads on update cadence (every 4 months vs every 19 months) and review sentiment (83% vs 63%). Fretronome's advantage is price ($0.99 vs $9.99) and in-app purchases (none vs 3). On ads, monetization model 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

Fretronome costs $0.99 and FAC Phazer $9.99 up front. FAC Phazer sells 3 one-off in-app purchases. Fretronome asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

FAC Phazer holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: FAC Phazer has 30 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 63% of Fretronome's written reviews are positive against 83% of FAC Phazer's.

UpkeepUpdate frequency

Fretronome ships an update every 19 months, FAC Phazer every 4 months. Both last shipped on October 9, 2026.

Scorecard7 real differences · 3 level
Fretronome versus FAC Phazer: the parameters behind the verdict, then further details
ParameterFretronomeFAC Phazer
Price$0.99 — better$9.99
Rating3.7 (3 ratings)5.0 (30 ratings) — better
Positive reviews62.5% of reviews83.3% of reviews — better
Number of ratings330 — better
Update frequencyEvery 19 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS13.0 — better16.4
Further details — not scored
Size7 MB3 MB
Age rating4+4+
DeveloperNeueinteraktion Design und Systeme GmbHFrederic Corvest

Customer experience

Fretronome

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews16 reviews
Positive62.5%
Neutral25.0%
Negative12.5%

FAC Phazer

All ratings30 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews18 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

In-app purchases

None

Fretronome

No in-app purchases

3 purchases

FAC Phazer

One-time3
  • Small Tip$1.99
  • Medium Tip$4.99
  • Large Tip$14.99

Questions

Is Fretronome free?
Fretronome costs $0.99, with no in-app purchases.
Is FAC Phazer free?
FAC Phazer costs $9.99, and also offers in-app purchases.
Which has better reviews, Fretronome or FAC Phazer?
FAC Phazer is rated higher. Fretronome averages 3.7 out of 5 from 3 ratings, while FAC Phazer averages 5.0 from 30 ratings.
Do Fretronome or FAC Phazer have ads?
Neither Fretronome nor FAC Phazer shows ads.
Which is updated more often, Fretronome or FAC Phazer?
Fretronome ships an update every 19 months, and FAC Phazer every 4 months. Most recently, Fretronome was updated on October 9, 2026 and FAC Phazer on October 9, 2026.

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