Lothar app icon

Apps Like Lothar for iPhone and iPad

Explore the Collatz Conjecture sequences.

The app explores the Collatz Conjecture, a mathematical problem concerning sequences generated by specific rules. It also implements a reverse function to trace sequences backward.

by Jeffrey Jacobs★ 5.01 ratingsEducation$0.99Data updated 2026-09-16
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Ranked alternatives

Showing 381–400 of 1,000 ranked alternatives.

  2. Mentory – AI Mentor app icon

    Mentory – AI Mentor

    Mentory GmbH

    Create action plans and tasks tailored

    Chat with an AI to discuss goals and create action plans. Set personal objectives and break them into manageable tasks. Generate structured strategies for habit building, career changes, or financial planning.

    ★ 5.012 ratingsProductivityFreeData updated 2026-09-06
    App details
  3. Eastern Star Church app icon

    Eastern Star Church

    EASTERN STAR MISSIONARY BAPTIST CHURCH INC, THE

    View sermons and events

    Access sermons and events from three Indianapolis locations. View Pastor Jeffrey A. Johnson, Sr.'s on-demand messages. Share content via Twitter, Facebook, or email. Check schedules and updates.

    ★ 4.712 ratingsEducationFreeData updated 2026-09-09
    App details
  2. Rainbow Music Notes app icon

    Rainbow Music Notes

    Tie Zhong

    Play piano with color-coded games

    Learn piano through interactive gameplay. Recognize and memorize with color associations. Play in four themes and hear chord sounds for each note. Receive a score card after each session to track progress.

    ★ 4.36 ratingsEducation$3.99Data updated 2026-09-08
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  3. Parent Booker app icon

    Parent Booker

    Richard Hall

    Sign up for volunteer opportunities

    Track volunteer hours and compare them to school targets. View opportunities tailored to your children's classes. Sign up or withdraw instantly. Record service hours directly through the .

    ★ 4.612 ratingsEducationFreeData updated 2026-09-08
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  8. Incredible Numbers! app icon

    Incredible Numbers!

    NatureGuides Ltd.

    Explore numbers, patterns, and concepts

    Explore mathematical concepts through interactive examples and real-world applications. Learn about number patterns, music theory, and problem-solving techniques.

    ★ 5.09 ratingsEducation$6.99Data updated 2026-09-09
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  11. Biomechanics of the Spine Lite app icon

    Biomechanics of the Spine Lite

    Anatomy Standard OU

    Explore spinal anatomy with 3D models

    Explore a realistic 3D model of the human with adjustable lighting and background. Manipulate the model for full range of motion using dynamic sliders. Switch between user-defined poses and view layered anatomical structures.

    ★ 3.97 ratingsMedical$12.99Data updated 2026-09-06
    App details
  12. Tudao Robot app icon

    Tudao Robot

    Guangzhou Tudao Information Technology Co., Ltd.

    ★ 5.07 ratingsUtilitiesFreeData updated 2026-09-06
    App details
  14. EQD Calculator app icon

    EQD Calculator

    Hiroyuki KATOH

    Calculate BED and EQD values instantly

    Calculate equivalent dose (EQD) and biologically effective dose (BED) using formulas for radiotherapy. Input parameters such as dose per fraction, total dose, and fractionation scheme. Display results instantly. Save and export calculations.

    ★ 4.47 ratingsMedicalFreeData updated 2026-09-09
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How we rank alternatives

Apps are ranked by functional similarity, category fit, rating confidence, and popularity.