80's Match: Rad Vibes Only! icon
Circle o Fifths: Music Theory icon
Knight Fight Lite icon
+1

Tim Mueller

For musicians, students of music theory, and individuals requiring speech-assistance tools, alongside casual gamers interested in retro aesthetics.

4apps2.4(1K) Multi-theme

Snapshot

Who is Tim Mueller?

Providing specialized educational and creative tools for musicians and individuals with communication needs. Balancing utility-focused apps with retro-inspired casual gaming.

Target audience

MusiciansStudents of music theoryIndividuals requiring speech-assistance tools

Active nemesis

Chordify BV

Other rivals

Portfolio

Free 3
4
apps
Games2
Education1
Music1

Last updated

Circle o Fifths: Music Theory

v1.3.4

2.1y ago

Maintenance

Publisher DNA

What defines Tim Mueller?

Publisher DNA

Primary focus

Educational tools and retro-themed casual games

Scale

indie

Target audience

Musicians, students of music theory, and individuals requiring speech-assistance tools, alongside casual gamers interested in retro aesthetics.

Signature Patterns

  • •Focus on niche, single-purpose utility apps for education and music
  • •Integration of retro, pixel-art, or neon visual aesthetics in gaming titles
  • •Mixed monetization strategy ranging from paid utility tools to free-to-play games
  • •Development of specialized, non-mainstream user interfaces
Maintenance

Portfolio momentum

Released 1 update in the last 6 months with 1 abandoned app, indicating a slow development cadence focused on maintaining existing niche tools.

Last release 78d agoActive apps 3Abandoned 1

Portfolio

What does Tim Mueller ship?

Single-market publisher, every app ships only to United States.

Based on 1 of 4 apps with localized market data, more coverage rolling in as scans complete · last scanned .

Americas (1)

  • United States1 / 1

Core markets (1/1 apps)

United States

Rivals

Who does Tim Mueller compete with?

The rivals identified

Nemeses(1)

Chordify BV

known forChordify: Songs, Chords, Tuner

1 app4.2Music

Both apps target musicians seeking chord structure support, though Chordify focuses on song-specific playback while Circle of Fifths provides a static reference tool.

Contenders(10)

Better Notes

known forChordBank: Learn Guitar Chords

1 app4.7Music

Both apps compete for the time of guitarists and music students by providing tools for chord practice and theory reference. They overlap in the specific domain of guitar chord training and music theory education.

Coda Labs Incorporated

known forTone - Learn Perfect Pitch!

1 app4.5Music

Both apps target music students and enthusiasts, competing for the same time and attention within the music education category.

Gismart

known forGuitar - Chords, Tabs & Games

1 app4.4Music

Both apps target guitarists and music students seeking portable tools for chord and theory practice. They compete for the same user base looking to improve their technical proficiency.

John Walbolt

known forPocket Guitar Chords

1 app4.8Music

Both apps target guitarists seeking chord and theory references, creating direct competition for users choosing between a paid theory-focused tool and a free minimalist reference guide.

JSplash Apps

known forGtrLib Chords - Guitar Chords

1 appMusic

Both apps target guitarists seeking chord references, creating direct competition for users looking to expand their playing vocabulary and theory knowledge.

Michael Krautsieder

known forChord Progression Generator

1 app4.7Music

Both apps target musicians seeking chord structure assistance, with the rival capturing the electronic production segment via MIDI export functionality.

myrApps

known forMyMusicTheory - Music Theory

1 app4.7Music

Both apps target music theory students, but MyMusicTheory offers an extensive curriculum of sight-reading and rhythm exercises while Circle of Fifths focuses on chord visualization.

Ten Kettles

known forWaay: Learn music theory

1 app4.9Music

Both apps target musicians seeking music theory education, with Waay offering a broader curriculum of interactive lessons while Circle of Fifths provides a specialized reference tool.

Trio Software

known forSolo - Fretboard Visualization

1 appMusic

Both apps target guitarists seeking to improve musical proficiency, forcing a choice between passive theory reference and active instrument-connected training.

Yousician

known forGuitarTuna: Tune & Play Guitar

1 app4.5Music

Both apps target beginner to intermediate musicians seeking guitar-related educational and practice tools, creating a direct overlap in the learning and reference utility space.

Same space(8)

Christian Hengst Daniels

known forTONALY: Songs, Scales & Theory

1 app4.7Music

TONALY offers a broader songwriting suite that includes the circle of fifths as a core component for theory and scale mastery.

Daniele Sidoli

known forHorucco: Chord Progressions

1 app4.1Music

Horucco analyzes audio to identify chord progressions, providing a practical application for the theory concepts taught in the source app.

Fender Digital

known forFender Tune: Guitar Tuner App

1 app4.8Music

Fender Tune serves as a utility for the same guitar-playing audience but focuses on pitch accuracy rather than theory education.

Jun Tsuda

known forChord Progression Manager

1 app0.0Music

Chord Progression Manager offers a mobile-first workspace for building and saving chord progressions, complementing the theory reference tools in the source app.

Mathieu Routhier

known forSuggester 2 : Chords & Scales

1 app4.6Music

Suggester 2 functions as a chord progression generator that helps users explore harmonic relationships, similar to the theory focus of the source app.

Monochoria Design Co.

known forPumi – Chord Progression Keys

1 app0.0Music

Pumi provides a specialized keyboard for chord entry, serving as a productivity tool for the same theory-focused user base.

WABI PLANT

known forChord Progression Visualizer

1 app0.0Music

Chord Progression Visualizer visualizes chord progressions using color-coding, sharing the interactive design philosophy of the source app.

Xssemble s.r.o.

known forGuitar chords and tabs

1 app4.7Music

Guitar chords and tabs provides a library of over 1,000,000 tabs and chords, acting as a reference for songs rather than a theory learning tool.

The Analyst's Read

The bottom line on Tim Mueller

Bottom line

The publisher is a small-scale developer currently balancing stable, high-utility educational apps with speculative, retro-themed gaming projects. Their long-term viability depends on whether they can grow the user base for their niche tools or successfully monetize their newer gaming titles.

Frequently asked questions

How many apps does Tim Mueller publish?
Tim Mueller has 4 apps tracked by Marlvel, primarily in the Games category.
What kind of apps does Tim Mueller make?
Tim Mueller's portfolio is concentrated in Games and Education, with an average rating of 2.4/5 across rated apps.
What is Tim Mueller's top app?
By review volume across the portfolio, Circle o Fifths: Music Theory is Tim Mueller's best-known app tracked by Marlvel.
In how many countries are Tim Mueller's apps available?
Marlvel has tracked Tim Mueller's apps across 1 country.

What fed this analysis

Apps analyzed:
4
With full intel:
0
With overview:
4
Website scraped:
yes
Social presence:
no

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by Tim Mueller, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Cite this report

Marlvel.ai. “Tim Mueller intelligence.” Updated 2026-05-07. https://marlvel.ai/publishers/tim-mueller

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Data licensed under CC-BY-NC 4.0