Comparison

PML Engineer Exam Prep vs Linear Algebra World

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

PML Engineer Exam Prep

Features
Read full description

PASS YOUR PROFESSIONAL MACHINE LEARNING ENGINEER EXAM 500+ practice questions 5-minute study sessions Track your progress Remove mastered questions Text-to-speech support Dark mode available WHY GET CERTIFIED? Certified Google Cloud ML engineers earn up to $203K annually (Skillsoft 2024). Professional Machine Learning Engineer validates expertise in building, deploying, and optimizing AI solutions on Google Cloud. WHAT YOU'LL MASTER: BigQuery ML for regression, classification, and time-series models Vertex AI Agent Builder with RAG applications AutoML for tabular, text, image, and video data Model Garden with foundation models and industry APIs Vertex AI Feature Store and data preprocessing Jupyter notebooks with Vertex AI Workbench and Colab Enterprise Model training with TensorFlow, PyTorch, and JAX Hyperparameter tuning and distributed training TPU and GPU optimization strategies Vertex AI Pipelines and Kubeflow orchestration MLOps with CI/CD and model versioning Model monitoring and explainability Responsible AI practices and bias detection STUDY ANYWHERE: Coffee breaks. Commutes. Lunch hours. Turn dead time into machine learning expertise. Download now. Pass your exam. Master Google Cloud ML engineering.

About

Linear Algebra World

This app offers a rigorous yet accessible approach to linear algebra, combining a matrix calculator, interactive algorithm visualizer, and a structured learning path. It aims to build intuition through visual tools and a coherent system based on axioms, suitable for students and instructors.

Highlights
  • Matrix calculator
  • Interactive algorithm visualizer
  • Structured learning pathway
  • Visual tools for abstract topics
  • LaTeX import and export
  • Coherent system based on axioms
Features
Read full description

Linear Algebra World (LAW) presents linear algebra in a way that is accessible yet rigorous. It is designed for students of engineering, mathematics, data science and related fields, and may also serve as a visual presentation tool for instructors. The app combines three roles: • matrix calculator • interactive algorithm step visualizer • carefully designed learning pathway through linear algebra Our goal is to present linear algebra as a coherent system built on a small set of axioms. Definitions are separated from consequences, logical dependencies are made explicit, and notation is kept minimal to reduce cognitive load. Visual tools are used extensively—even for abstract topics such as the four fundamental subspaces—so that geometric intuition and algebraic reasoning reinforce one another. The curriculum begins with vectors as coordinates and matrices as collections of vectors, and currently covers topics through QR factorization. Upcoming additions include OLS, eigendecomposition, SVD, and PCA. This app builds on our earlier Matrix Solver Step by Step, a highly rated matrix computation app used by students for several years. LAW adds a structured curriculum along with LaTeX import and export. LAW is designed for serious learners who want to understand the structure behind the computations. For quick step-by-step matrix calculations, Matrix Solver Step by Step may be the more direct tool. Your constructive feedback is essential to the continued refinement of the app.

Screenshots

PML Engineer Exam Prep3 screens
Linear Algebra World4 screens

Verdict

The call

The clearest difference is update cadence: Linear Algebra World at every 5 days against PML Engineer Exam Prep's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PML Engineer Exam Prep ships an update every 3 months, Linear Algebra World every 5 days. The most recent releases landed on September 28, 2026 and September 13, 2026 respectively.

Scorecard1 real difference · 8 level
PML Engineer Exam Prep versus Linear Algebra World: the parameters behind the verdict, then further details
ParameterPML Engineer Exam PrepLinear Algebra World
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.0 — better16.6
Further details — not scored
Size27 MB10 MB
Age rating4+4+
DeveloperDavy RaittEteri Byazrova

In-app purchases

None

PML Engineer Exam Prep

No in-app purchases

None

Linear Algebra World

No in-app purchases

Questions

Is PML Engineer Exam Prep free?
PML Engineer Exam Prep is free to download, with no in-app purchases.
Is Linear Algebra World free?
Linear Algebra World is free to download, with no in-app purchases.
Do PML Engineer Exam Prep or Linear Algebra World have ads?
Neither PML Engineer Exam Prep nor Linear Algebra World shows ads.
Which is updated more often, PML Engineer Exam Prep or Linear Algebra World?
PML Engineer Exam Prep ships an update every 3 months, and Linear Algebra World every 5 days. Most recently, PML Engineer Exam Prep was updated on September 28, 2026 and Linear Algebra World on September 13, 2026.

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