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Kai Oelfke

For health-conscious individuals and professionals seeking efficient, privacy-focused tools for personal management and habit tracking.

7apps4.7(56.3K) Multi-theme

Snapshot

Who is Kai Oelfke?

Providing streamlined health and productivity utilities for users seeking distraction-free, privacy-focused digital tools.

Target audience

Health-conscious individualsProfessionals seeking efficientPrivacy-focused tools for personal management

Active nemesis

HealthVida GmbH & Co. KG.

Other rivals

Portfolio

Free 7
7
apps
Health & Fitness3
Productivity2
Finance1
Utilities1

Last updated

Intermittent Fasting Tracker:

v0.0.96

6mo ago

Active

Publisher DNA

What defines Kai Oelfke?

Publisher DNA

Primary focus

Health, fitness, and productivity utility apps

Scale

indie

Target audience

Health-conscious individuals and professionals seeking efficient, privacy-focused tools for personal management and habit tracking.

Signature Patterns

  • Strong emphasis on privacy-first, account-free user experiences
  • Streamlined, single-purpose UI design across health and utility categories
  • Freemium or free-to-use pricing models with minimal reliance on aggressive advertising
  • Integration with Apple ecosystem features like Apple Watch and cross-device syncing
Active

Portfolio momentum

Released 6 updates across 7 apps in the last 6 months, indicating a consistent maintenance and development cycle.

Last release 21d agoActive apps 4Abandoned 3

Portfolio

What does Kai Oelfke ship?

Apps

7 apps analysed

Intermittent Fasting Tracker: icon
Intermittent Fasting Tracker:

Intermittent Fasting App : Lose weight with no diet,drink water reminder,recipes

4.9(45.4K)
View Intel →

Home screen widgets provide immediate utility for daily tracking

  • Simplicity and focus
  • Subscription gating

Distributed across 19 markets, strongest in Europe.

Based on 2 of 7 apps with localized market data, more coverage rolling in as scans complete · last scanned .

Americas (4)

  • United States2 / 2
  • Brazil1 / 2
  • Canada1 / 2
  • Mexico1 / 2

Europe (9)

  • France1 / 2
  • Germany1 / 2
  • Italy1 / 2
  • Netherlands1 / 2
  • Portugal1 / 2
+4 more europe markets
  • Spain1 / 2
  • Sweden1 / 2
  • Turkey1 / 2
  • United Kingdom1 / 2

Asia-Pacific (6)

  • India1 / 2
  • Indonesia1 / 2
  • Japan1 / 2
  • Singapore1 / 2
  • South Korea1 / 2
+1 more asia-pacific market
  • Vietnam1 / 2

Core markets (2/2 apps)

United States

User Sentiment

How do users feel about their apps?

1

Positive apps

0

Neutral / mixed

0

Negative apps

85/100

Avg sentiment score

Rivals

Who does Kai Oelfke compete with?

The rivals identified

Nemeses(3)

HealthVida GmbH & Co. KG.

known forFastic Weight Loss & Fasting

1 app4.4Health & Fitness

Fastic competes directly by capturing the same health-conscious demographic, shifting the focus from simple protein logging to broader metabolic health and fasting protocols.

Rise Science

known forRISE: Sleep Tracker

1 app4.7Health & Fitness

Dominates the sleep tracking niche with high-frequency updates and a sophisticated data-driven approach to sleep debt and circadian rhythm management.

ZipoApps

known forStopwatch & Timer

1 app4.4Utilities

With over 73,000 reviews, this app dominates the stopwatch niche by volume and serves as the primary benchmark for feature-rich, free-to-use timing utilities.

Contenders(9)

Applorium

known forMulti-Stopwatch

1 app4.6Utilities

Directly competes in the multi-stopwatch niche with a focus on specialized timing needs for trainers and athletes.

Bart Jacobs

known forFiber Tracker | Plant Power

1 app4.7Health & Fitness

This app targets the same health-conscious audience but focuses on a specific nutritional pillar—fiber—rather than protein.

Bodymatter

known forSleepWatch - Top Sleep Tracker

1 app4.7Health & Fitness

A massive incumbent in the sleep tracking space with a focus on deep integration with wearable health data.

Enerjoy Pte

known forShutEye®: Sleep Tracker, Sound

1 app4.8Health & Fitness

A strong multi-functional competitor that blends tracking with sleep-inducing content and smart alarm features.

Ipnos Software

known forBetterSleep: Relax and Sleep

1 app4.7Health & Fitness

Captures the relaxation and soundscape market, serving as a primary alternative for users seeking sleep aid rather than just calculation.

Pomegranate Apps

known forNutrients - Nutrition Facts

1 app4.3Health & Fitness

Nutrients overlaps with the target app by providing a deep, offline-accessible database of food information for precise macro tracking.

Prometheus Interactive

known forIntermittent Fasting - Clear

1 app4.7Health & Fitness

Clear competes for the attention of fitness-focused users who prioritize fasting schedules alongside their nutritional intake.

Sergey Astakhov

known forMultiTimer: Multiple timers

1 app4.7Utilities

This app is a strong contender due to its high release velocity and massive user base, indicating active development and strong market fit.

Toast Studio Australia

known forSimple Scales - Weight Tracker

1 app4.7Health & Fitness

This app competes for the same user base by offering granular data visualization and metric tracking that complements protein intake goals.

Same space(8)

ALWAYS FIT SUPLEMENTOS ALIMENTICIOS LTDA

known forAlways Fit - Viva mais

1 app4.8Health & Fitness

This app serves the same fitness-oriented audience by combining supplement tracking with e-commerce and longevity content.

First Phorm

known for1st Phorm

1 app4.3Health & Fitness

This app is a direct competitor in the fitness space, offering a comprehensive ecosystem that includes nutrition tracking.

Insight Network

known forInsight Timer: Meditate, Sleep

1 app4.9Health & Fitness

A massive player in the meditation space that overlaps with sleep hygiene through its extensive library of sleep-focused content.

Runloop

known forSeconds Pro Interval Timer

1 app4.8Utilities

While categorized under Health & Fitness, its core functionality overlaps significantly with stopwatch utilities for interval-based training.

Snatch Education (OPC)Private

known forIndian Weight Loss Diet

1 app4.3Health & Fitness

It targets the same weight management demographic but provides a more educational, content-heavy approach to nutrition.

Super Viral Studio

known forGoTall - Height Predictor

1 app4.5Health & Fitness

While niche, it competes for the same health-tracking user base by offering predictive modeling for physical growth.

The Mind Company

known forBalance: Meditation & Sleep

1 app4.9Health & Fitness

Focuses on personalized meditation programs that include sleep-specific tracks, competing for the user's pre-sleep time.

震 任

known forClock Wave

1 app3.7Utilities

Operates in the same utility space with a massive, albeit lower-rated, user base that highlights a different approach to time-based interfaces.

New entrants(3)

Batikan Bozkurt Kursat

known forSupplement Inventory

1 app0.0Health & Fitness

This newcomer targets the same fitness audience by adding inventory management to the standard nutritional tracking workflow.

Benjamin Dupin

known forFastZen - Fasting Tracker

1 app0.0Health & Fitness

FastZen enters the market by focusing on the intersection of fasting and progress tracking, appealing to the same health-conscious users.

Lifesum AB

known forLifesum: AI Calorie Counter

1 app4.6Health & Fitness

While primarily a nutrition app, its recent AI-driven health integration signals a move toward holistic health tracking that includes sleep.

The Analyst's Read

The bottom line on Kai Oelfke

Bottom line

This publisher effectively occupies a niche for minimalist, high-utility tools that prioritize user privacy and ease of use. Their high weighted rating suggests strong product-market fit for users who prefer focused, distraction-free alternatives to comprehensive, data-heavy platforms.

Frequently asked questions

How many apps does Kai Oelfke publish?
Kai Oelfke has 7 apps tracked by Marlvel, primarily in the Health & Fitness category.
What kind of apps does Kai Oelfke make?
Kai Oelfke's portfolio is concentrated in Health & Fitness and Productivity, with an average rating of 4.7/5 across rated apps.
What is Kai Oelfke's top app?
By review volume across the portfolio, Intermittent Fasting Tracker: is Kai Oelfke's best-known app tracked by Marlvel.
In how many countries are Kai Oelfke's apps available?
Marlvel has tracked Kai Oelfke's apps across 19 countries.

What fed this analysis

Apps analyzed:
7
With full intel:
0
With overview:
7
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 Kai Oelfke, 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. “Kai Oelfke intelligence.” Updated 2026-05-07. https://marlvel.ai/publishers/kai-oelfke

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Data licensed under CC-BY-NC 4.0