3D Plotter icon
Acceleration icon
Air Pressure App icon
+100

Piet Jonas

For professionals, web developers, and international travelers requiring specific technical, financial, or environmental data.

Known forAltitude App
103apps2.2(9.4K) Multi-theme

Snapshot

Who is Piet Jonas?

Providing specialized utility tools and calculators for professionals and technical users needing precise, localized data.

Target audience

ProfessionalsWeb developersInternational travelers requiring specific technical

Active nemesis

Fawkes Wei

Other rivals

Portfolio

Free 24
103
apps
Weather17
Travel11
Reference9
Finance7

Last updated

Altitude App

v1.4.1

2.4y ago

Steady

Publisher DNA

What defines Piet Jonas?

Publisher DNA

Primary focus

Utility tools and specialized calculators

Scale

studio

Target audience

Professionals, web developers, and international travelers requiring specific technical, financial, or environmental data.

Signature Patterns

  • •Focus on single-purpose utility tools with streamlined, functional interfaces.
  • •Heavy reliance on localized data engines including tax jurisdictions and geographic positioning.
  • •Hybrid monetization strategy utilizing both free-to-use and paid upfront models.
  • •Long-term maintenance of legacy titles, with some active apps dating back to 2008.
Steady

Portfolio momentum

Maintained a steady development cadence with 3 updates across the portfolio in the last 6 months, focusing on core utility functionality.

Last release 6d agoActive apps 5Abandoned 4

Portfolio

What does Piet Jonas ship?

Apps

103 apps analysed

Creative users enjoy the ability to generate complex 3D shapes like sombreros using the function input

  • Mathematical function plotting capabilities provide a useful tool for college students to visualize complex equations
  • Aggressive advertising and reliance on external web pages degrade the user experience and waste mobile bandwidth

Analysis in progress

Analysis in progress

Analysis in progress

Distributed across 6 markets, strongest in Europe.

Based on 30 of 103 apps with localized market data, more coverage rolling in as scans complete · last scanned .

Americas (2)

  • United States30 / 30
  • Mexico8 / 30

Europe (4)

  • Germany29 / 30
  • France10 / 30
  • Spain9 / 30
  • Italy6 / 30

Core markets (30/30 apps)

United States

User Sentiment

How do users feel about their apps?

0

Positive apps

2

Neutral / mixed

6

Negative apps

21/100

Avg sentiment score

Unlock the app dragging this portfolio down.

Access the full report for free

Rivals

Who does Piet Jonas compete with?

The rivals identified

Nemeses(3)

Fawkes Wei

known forAccelerometer ∞

1 app3.1Navigation

Both apps target users requiring real-time gravitational and vibration force measurement, competing directly for the same niche scientific utility audience.

Michal Majewski

known forWorld Quiz: Learn Geography

1 app4.8Games

Both apps target geography enthusiasts and students with trivia mechanics, but World Quiz captures a larger audience through a free-to-play model and diverse game modes.

MORETHAN APPS

known forHygrometer - Humidity

1 app4.7Weather

Both apps provide location-based humidity tracking, targeting users who monitor local environmental conditions via mobile and Apple Watch.

Contenders(17)

58works

known forAccelerometer Visual

1 app3.3Navigation

Both apps target users seeking to visualize accelerometer data, competing for the same utility-focused audience on the same platform.

Andrey Solovyev

known forCapitals of the World - Quiz

1 app4.2Games

Both apps target geography enthusiasts with trivia, but the rival captures the market via a free pricing model and a significantly larger user base.

Chrystian Vieyra

known forPhysics Toolbox Accelerometer

2 apps4.8Navigation

Both apps target users measuring physical acceleration forces, with Physics Toolbox Accelerometer offering free access to data export features that Acceleration lacks.

Evgenii Viushkov

known forWorld Capital Cities Quizizz

2 apps4.7Games

Both applications target geography trivia enthusiasts focused on world capital memorization, creating direct competition for the same user base.

Huseyin Aykut Uludag

known forPhysics Labs

1 app0.0Navigation

Physics Labs competes with Acceleration by providing overlapping accelerometer measurement features while offering additional sensor data types and export functionality.

Integy Tech

known forG-Force Meter Pro

1 app0.0Navigation

G-Force Meter Pro targets the same driving-focused utility audience as Acceleration but expands the feature set to include speed tracking and session recording.

Jupli

known forMap Quiz World Tour

1 app4.3Games

Both apps target the geography trivia market, with Map Quiz World Tour offering a broader range of content including US states and historical sporting event locations.

LionsApp di Nallbati Elton

known forHygrometer - Air humidity

1 app4.8Weather

Both applications occupy the same 1.99 dollar price point in the utility category, forcing users to choose between outdoor weather tracking and indoor health-focused environmental monitoring.

Matthew Leonard

known forWorld Capitals: Geography Quiz

1 app3.9Games

Both apps target geography enthusiasts and students with trivia-based learning, competing for the same user base seeking to memorize world capitals.

Michael Quach

known forWorld Capitals Fun Trivia Quiz

1 app3.0Games

Both apps target the geography trivia market, with the rival offering a free alternative to the paid Capital Quiz model.

Supergonk

known forWorld Geography Trivia Quiz

1 app4.7Games

Both apps target the same geography trivia audience, but Weltgeographie captures users through a free-to-play model and broader content scope.

Takao Ichimura

known forHorizontal Accelerometer

1 app0.0Navigation

Both apps target users measuring physical acceleration forces, with Horizontal Accelerometer specifically addressing automotive and engineering use cases.

Till Henrik Jonathan Hillebrand

known forWhere is that?

1 app3.9Games

Both applications target students and geography enthusiasts with trivia-based learning, creating direct competition for the same user base.

Tirin

known forHygrometer: Air Humidity

1 app2.0Weather

Both applications target users seeking location-based humidity tracking, creating direct competition for the same utility-focused audience.

Vladimir Bayatov

known forWorld Capitals Quiz Test Game

1 app4.6Games

Both apps target geography enthusiasts with trivia content, but the rival captures the casual market through a free, ad-supported model that contrasts with the paid entry barrier of Capital Quiz.

Werner Kolov

known forWhatWeather Weather Station

1 app4.7Weather

Both applications target users seeking local meteorological data, though they diverge in hardware deployment and scope. They compete for the same audience of weather-conscious users looking for specific environmental monitoring tools.

Yangmei Studios AB

known forCountry Quest: Guess Countries

1 app4.1Games

Both apps target the geography trivia market, with Country Quest offering a free-to-play model that directly challenges the paid entry point of Capital Quiz.

Same space(39)

Albert Xu

known forGonna Rain?

1 app0.0Weather

This app offers a simplified, notification-based utility for rain, competing for the same casual user who wants quick, specific weather answers.

Andy Sutanto

known forAccelerometer

1 app0.0Navigation

This app offers a comprehensive suite for motion measurement and session management.

Apps And Stuff

known forLocal Weather & Forecast

1 app4.3Weather

This app provides a comprehensive weather report including humidity, positioning itself as a one-stop shop for the same user base.

Asaru Labs

known forVibration Detector Sensor

1 app5.0Navigation

This app provides industrial-grade vibration monitoring for mechanical and HVAC diagnostics.

BITHAUS.TECH, UNIPESSOAL LDA

known forGPS Speedometer MPH Tracker

1 app4.7Navigation

This app shifts the focus from raw sensor force to navigation metrics like speed and altitude for drivers.

Carlos Aviles Software

known forRain Alarm Live Weather Radar

1 app4.3Weather

Rain Alarm focuses on immediate, actionable precipitation alerts, which serves as a more critical utility for the same outdoor-focused audience.

Chernika Digital

known forGeo Genius - Learn Geography

1 app0.0Games

This app replaces standard flashcard formats with a map-based exploration interface, appealing to users who prefer visual learning over the text-based approach of Capital Quiz.

Dimitri Giani

known forDigital GPS Odometer

1 app0.0Navigation

This app focuses on GPS-based distance and speed tracking for vehicle performance tests.

Dmitriy Kharutskiy

known forVibration analysis

1 app3.8Navigation

This app serves industrial maintenance by providing spectral diagnostics for rotating machinery.

DreamArc

known forAccelerometer – G-Force Meter

1 app4.0Navigation

This app provides a direct alternative for real-time acceleration tracking with added recording capabilities.

EINMOB

known forHi Weather

1 app2.5Weather

Hi Weather provides a global, multi-location tracking experience that offers more breadth than a single-purpose humidity utility.

Enjoy Life Studio

known forLocal Weather:Weather Forecast

1 app4.8Weather

This app serves as a broad-spectrum weather utility that includes humidity as one of many data points, competing for the same screen real estate as a dedicated humidity tool.

Eren Berkay Dinc

known forGeography: World Quiz

1 app5.0Games

This app provides a multilingual trivia alternative for users seeking broader language support than the English-focused Capital Quiz.

ExaMobile S.A.

known forVibration Meter, seismograph

1 app4.2Navigation

This app targets seismic monitoring using the same accelerometer hardware as the source app.

HLIMATE INNOVATIONS PRIVATE

known forLocal Weather: Live & Hourly

1 app4.3Weather

This app provides a broader 15-day outlook and wind analysis, making it a more comprehensive planning tool than a single-focus humidity app.

Huju Network Technology CO.

known forLocal Weather - Radar & Widget

1 app4.1Weather

This app provides a clean, intuitive interface for general atmospheric details, directly challenging the simplicity of the Humidity App.

Impala Studios

known forWeather ۬

1 app4.5Weather

This app provides a similar real-time monitoring experience but adds professional-grade storm tracking that broadens its utility beyond basic humidity.

Joanna Bednarczyk

known forGPS Stats - Speedometer & HUD

2 apps0.0Navigation

This app provides a multi-metric dashboard for various outdoor activities and travel.

Kazuhisa Kobayashi

known forDriving Assist - G-Force Meter

2 apps5.0Navigation

This app provides driving telemetry analysis to help users refine their vehicle handling skills.

Kyu-Hee Jang

known forG-Force Meter+: Tesla 0-60

1 app1.0Navigation

This app provides a visual-heavy interface for tracking G-forces during performance testing.

Life Assistant Studio

known forLocal Weather Forecast& Widget

1 app4.5Weather

This app offers a more comprehensive dashboard of environmental data, making it a more functional alternative for users needing more than just humidity.

Lutech-DN

known forNOAA Weather Radar Live Map

1 app4.6Weather

This app competes by offering a built-in barometer and severe weather tracking, providing more hardware-linked data than the source app.

LW Brands

known forNational Weather Forecast Data

2 apps4.8Weather

This app targets the power-user segment of the same audience by providing access to professional meteorological models.

Min-Tsung Tasi

known forG-Force Meter Tracker

1 app0.0Navigation

This app provides a specialized dashboard for automotive G-force monitoring.

Mini Media Lab

known forHumidity

1 app3.8Weather

This app is a direct functional substitute that differentiates itself by being ad-free, directly addressing the utility-focused user.

Mosaic S.r.l.

known forClime: NOAA Weather Radar Live

2 apps4.5Weather

Clime competes by offering high-resolution radar data that provides more actionable safety intelligence than the simple humidity tracking found in the source app.

Not Boring Software

known for(Not Boring) Weather

1 app4.8Weather

This app targets the aesthetic-conscious user who wants humidity and weather data presented through a high-fidelity, gamified interface.

Perfectly Tool Apps Lab

known forLocal Weather - Weather Widget

1 app4.8Weather

This app competes by offering a more robust set of environmental indicators and location management features in a single interface.

Pixel Management

known forPeakG - G-Force & Motion Meter

1 app0.0Navigation

This app provides high-frequency motion recording for pilots and athletes.

REGREX Co.

known forAcceleration sensor logger

1 app4.3Navigation

This app provides a legacy utility for raw motion sensor data collection and export.

Rob Barltrop

known forG - Meter

1 app3.0Navigation

This app focuses on automotive performance by calculating G-forces for vehicle maneuvers.

Smart Fox ApS

known forGeography Games: Learning Quiz

1 app4.8Games

This app provides an offline-first experience that serves users in transit, contrasting with the standard quiz format of Capital Quiz.

Thiem Nguyen

known forMotion Sensor Analyzer Tool

1 app3.0Navigation

This app targets professional researchers by offering high-frequency sampling for motion analysis.

Tiago Mendes

known forHumidity Window - Stoßlüften

1 app4.9Weather

This app provides a specific use-case for humidity data, focusing on home ventilation rather than general outdoor monitoring.

Ulugbek Samigjonov

known forFlag Quiz - Learn Geography

1 app0.0Games

Users report: This app targets a younger demographic with a kid-friendly design, serving as a specialized alternative to the general-purpose Capital Quiz.

Weather Underground

known forWeather data & microclimate :

1 app4.7Weather

This app targets the same hyperlocal interest as Humidity App but leverages a massive network of personal weather stations for higher precision.

Windy Weather World

known forWindy.app — Wind, Tides, Radar

1 app4.7Weather

Windy.app provides granular meteorological data for niche outdoor activities, offering a more professional alternative for users who find simple humidity tracking insufficient.

Y Lau

known forG FORCE

1 app5.0Navigation

This app serves automotive enthusiasts by quantifying performance metrics during cornering and braking.

YUJI IKEDA

known forG-G Diagram

1 app5.0Navigation

This app provides motorsports telemetry for analyzing driving techniques on a circuit.

New entrants(3)

Deep Orbit B.V.

known forWeather & Rain Radar Forecast

1 app5.0Weather

This app provides a more robust set of environmental data including pollen and air quality, making it a superior utility for health-conscious users.

The App Tower

known forWeather Forecast

1 app0.0Weather

This app competes by offering a living, animated interface that provides more visual engagement than the source app's 'steamed up' effect.

XUAN-VIEN DO

known forSpeed-Do-Meter

1 app0.0Navigation

This app tracks speed and G-force using Doppler-based GPS and barometric data.

The Analyst's Read

The bottom line on Piet Jonas

Bottom line

Piet Jonas is a disciplined utility publisher that successfully captures niche professional intent through specialized calculation tools. Their portfolio demonstrates strong product-market fit in the Shopping and Reference categories, sustained by a low-churn, utility-first user base.

Frequently asked questions

How many apps does Piet Jonas publish?
Piet Jonas has 103 apps tracked by Marlvel, primarily in the Weather category.
What kind of apps does Piet Jonas make?
Piet Jonas's portfolio is concentrated in Weather and Travel, with an average rating of 2.2/5 across rated apps.
What is Piet Jonas's top app?
By review volume across the portfolio, Altitude App is Piet Jonas's best-known app tracked by Marlvel.
In how many countries are Piet Jonas's apps available?
Marlvel has tracked Piet Jonas's apps across 6 countries.

What fed this analysis

Apps analyzed:
12
With full intel:
0
With overview:
12
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 Piet Jonas, 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. “Piet Jonas intelligence.” Updated 2026-04-24. https://marlvel.ai/publishers/piet-jonas

See methodologyContact support

Data licensed under CC-BY-NC 4.0