Comparison

Stringflo vs SUS4 Backing Tracks

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

Head to head
About

Stringflo

Master the guitar fretboard with interactive note training, real-time pitch detection, and comprehensive theory tools. Practice with customizable challenges, visualize note positions, and track your progress to build fluency and deepen your understanding of the instrument.

Highlights
  • Randomized note challenges
  • Real-time pitch feedback
  • Fretboard visualization
  • Customizable practice sessions
  • Built-in tuner
  • Chord and scale theory tools
  • Progress tracking
Features
Read full description

Stringflo: Master the Guitar Fretboard Stringflo helps guitarists build real fretboard fluency through interactive note training, real-time pitch detection, theory tools, tuning support, and visual progress tracking. Practice with randomized note challenges, get instant feedback as you play, reveal fretboard positions when you need help, and customize your sessions by string, note, and sensitivity level. Then go deeper with built-in theory tools for chords, scales, CAGED shapes, intervals, fret numbers, and full-neck maps. Key Features • Randomized Note Challenges: Build fretboard fluency with dynamic practice prompts • Real-Time Pitch Feedback: Instantly see whether you’re playing the correct note • Fretboard Visualization: Reveal note positions and reinforce spatial memory • Customizable Practice: Select the exact strings and notes you want to train • Built-In Tuner: Tune and monitor pitch directly in the app • Theory Tools: Explore chords, scales, CAGED forms, intervals, notes, and fret numbers • Full Neck Maps: Study patterns across the fretboard with clear visual diagrams • Progress Tracking: Monitor practice history, speed, and consistency over time • Adaptive Sensitivity: Adjust pitch detection for different playing environments • Minimal Interface: Designed for clarity, focus, and fast learning Stringflo combines repetition, ear training, real-time feedback, and visual reinforcement to help you recognize notes faster and understand the fretboard more deeply. Whether you’re learning your first positions or refining advanced fretboard knowledge, Stringflo gives you focused tools for smarter practice.

About

SUS4 Backing Tracks

Features
Read full description

A drum, bass and keys band to improvise over, in the style and key you pick. Blues, jazz ii-V-I, funk, gospel, hip-hop, Latin, R&B, reggae and more, generated on your phone, so it works with no signal. Fully on-device: no cloud, no account. Choose a style and a key, set the tempo, and play. Use Solo Me to drop a part out and play it yourself: take the bass out and you are the bass player. Write a chord progression in the editor when the library does not have the changes you need. • Tracks by style, each labeled with its key and tempo • Change key and tempo • Solo Me: mute a part and play it • A chord progression editor for other changes • Loop a section to work on it For guitarists, bassists and keyboard players learning to solo, and anyone who wants to practice with a band instead of a metronome. Pro, or SUS4 All-Access across the whole range, opens the full track library, key and tempo changes, looping and stem export. Made in the UK by working musicians. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Stringflo4 screens
SUS4 Backing Tracks4 screens

Verdict

The call

The clearest difference is update cadence: SUS4 Backing Tracks at fortnightly against Stringflo's every 4 months. SUS4 Backing Tracks also leads on iOS requirement (16.0 vs 18.2). On price, 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

Both are free to download. Stringflo sells 2 in-app purchases, starting at $0.99 per month and SUS4 Backing Tracks sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Stringflo ships an update every 4 months, SUS4 Backing Tracks fortnightly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 7 level
Stringflo versus SUS4 Backing Tracks: the parameters behind the verdict, then further details
ParameterStringfloSUS4 Backing Tracks
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 4 monthsFortnightly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS18.216.0 — better
Further details — not scored
Size4 MB45 MB
Age rating4+4+
DeveloperOshry Ben-HarushThePaulSmith

In-app purchases

2 purchases

Stringflo

Subscriptions2
  • Monthly subscription$0.991 Month
  • Monthly subscription3 Days trial$0.991 Month
3 purchases

SUS4 Backing Tracks

Subscriptions2
  • SUS4 Backing Tracks Pro Monthl7 Days trial$0.991 Month
  • SUS4 All-Access7 Days trial$4.991 Month
One-time1
  • SUS4 Backing Tracks Lifetime$59.99

Questions

Is Stringflo free?
Stringflo is free to download, with in-app purchases available.
Is SUS4 Backing Tracks free?
SUS4 Backing Tracks is free to download, with in-app purchases available.
Do Stringflo or SUS4 Backing Tracks have ads?
Neither Stringflo nor SUS4 Backing Tracks shows ads.
Which is updated more often, Stringflo or SUS4 Backing Tracks?
Stringflo ships an update every 4 months, and SUS4 Backing Tracks fortnightly. Most recently, Stringflo was updated on October 24, 2026 and SUS4 Backing Tracks on October 25, 2026.

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