iSH Shell icon
Modulus Calculator icon
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Theodore Dubois

For developers, mathematics students, and niche language enthusiasts seeking specialized functional tools.

Known foriSH Shell
3apps4.4(1.2K)UtilitiesDeveloper Tools

Snapshot

Who is Theodore Dubois?

Providing specialized open-source utilities and developer tools for technical power users and academic niches.

Target audience

DevelopersMathematics studentsNiche language enthusiasts seeking specialized functional tools

Active nemesis

7th Gear

Other rivals

Portfolio

Free 3
3
apps
Utilities2
Developer Tools1

Last updated

iSH Shell

v1.3.2

3.3y ago

Dormant

Publisher DNA

What defines Theodore Dubois?

Publisher DNA

Primary focus

Technical utilities and developer tools

Scale

indie

Target audience

Developers, mathematics students, and niche language enthusiasts seeking specialized functional tools.

Signature Patterns

  • Commitment to 100% free, open-source software models without traditional monetization.
  • Development of highly specialized tools for niche academic or technical communities.
  • Focus on functional, low-abstraction interfaces such as terminal emulators and specialized calculators.
  • Reliance on community support platforms like Patreon rather than in-app advertising.
Dormant

Portfolio momentum

The portfolio is currently stagnant with zero releases in the last 6 months and all three titles classified as abandoned.

Active apps 0Abandoned 3

Portfolio

What does Theodore Dubois ship?

Apps

3 apps analysed

Interactive keyboard slider reduces friction for terminal navigation

  • The lightweight Alpine Linux runtime provides a powerful and authentic command line environment for mobile power users
  • Frequent application crashes during package installation or standard operations disrupt the development workflow for many users

Free distribution model removes barriers for student adoption

  • Specialized modular arithmetic engine serves a distinct academic niche

Optimized interface enables rapid text entry compared to standard character-selection utilities.

  • Gesture-based input mechanism provides a specialized workflow for sitelen pona script composition.

User Sentiment

How do users feel about their apps?

1

Positive apps

0

Neutral / mixed

0

Negative apps

65/100

Avg sentiment score

Rivals

Who does Theodore Dubois compete with?

The rivals identified

Nemeses(1)

7th Gear

known forCalculator for iPad!

1 app4.7Utilities

This app directly competes for the utility-focused user base by offering a comprehensive suite of scientific and high-precision tools that mirror the target's core functionality.

Contenders(4)

Enbright

known forDash Calc: Simple Fast Math

1 app5.0Utilities

Dash Calc competes by focusing on speed and real-time feedback, targeting users who prioritize efficiency over the target's multi-tool approach.

kohei yamane

known forTriangle Calc A

1 app0.0Utilities

This app competes by specializing in niche geometric problem-solving, capturing a segment of the target's scientific calculator audience.

MobArts

known forBasic Calculator: Classic Calc

1 app4.8Utilities

This app targets the same utility-seeking demographic by emphasizing high-precision display and standard memory functions.

Nitrio

known forElectric Motors Speed Calc

1 app4.0Utilities

This app competes by offering specialized physics-based calculation engines that serve the professional engineering segment of the target's user base.

Same space(5)

Amanuel Abebaw

known forUnit Converter For Engineers

1 app4.5Utilities

This app targets the professional engineering segment of the target's audience with specialized, high-precision conversion tools.

Moaaz Afzal

known forQuick Unit Converter: All in 1

1 app4.5Utilities

This app provides a similar all-in-one conversion experience, directly challenging the target's utility suite.

Mustafa Tolga DALBUDAK

known forCuspart: Unit Converter

1 app4.5Utilities

This app overlaps with the target's unit conversion functionality, serving users who need a dedicated, offline-capable tool.

omz:software

known forPythonista 3

1 app4.5Developer Tools

The most popular local Python environment; shares the same 'local coding' audience as iSH.

Differentiators

  • Long-standing reputation for high-quality iOS automation tools
  • Creator of Editorial, another power-user favorite
Oyku Gul Imran

known forUnit Converter Pro

1 app4.7Utilities

This app competes by offering a professional-grade conversion experience with advanced input methods.

New entrants(2)

App ahead

known forAspect Ratio Pro

1 app4.0Utilities

This app enters the market by focusing on a specific, high-demand calculation task for creative professionals.

Vivy Technologies

known forNumby Pro

1 app0.0Utilities

This newcomer disrupts the space by integrating natural language processing to simplify complex calculations.

The Analyst's Read

The bottom line on Theodore Dubois

Bottom line

Theodore Dubois is a niche indie developer with a proven track record of building high-utility tools for technical audiences. While the portfolio demonstrates strong product-market fit within its specific categories, the lack of recent updates suggests these projects are no longer under active development.

Frequently asked questions

How many apps does Theodore Dubois publish?
Theodore Dubois has 3 apps tracked by Marlvel, primarily in the Utilities category.
What kind of apps does Theodore Dubois make?
Theodore Dubois's portfolio is concentrated in Utilities and Developer Tools, with an average rating of 4.4/5 across rated apps.
What is Theodore Dubois's top app?
By review volume across the portfolio, iSH Shell is Theodore Dubois's best-known app tracked by Marlvel.

What fed this analysis

Apps analyzed:
3
With full intel:
3
With overview:
3
Website scraped:
yes
Social presence:
yes

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 Theodore Dubois, 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. “Theodore Dubois intelligence.” Updated 2026-04-24. https://marlvel.ai/publishers/theodore-dubois

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Data licensed under CC-BY-NC 4.0