ReadOn vs ML_Engineering
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ReadOn
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ReadOn – your companion for reading in new languages without breaking your flow. Scan book pages and articles, tap words for instant translations, and keep reading without constantly switching to a dictionary. ReadOn helps you close the “dictionary gap” so you can stay immersed in the text while naturally building vocabulary. Use Word-by-word mode for quick lookups or Deep Read mode for richer explanations and context. View extracted text, copy what you need, save important words, and grow your personal vocabulary as you read. With support for 50+ languages, ReadOn helps you learn faster from real books, manga, articles, and notes. Whether you are studying for exams, improving your reading fluency, or simply enjoying content in a new language, ReadOn helps you read more, understand more, and stop less. Subscription and Trial: ReadOn operates on a subscription model. Some features require users to purchase premium features. Premium features: • Unlimited text scanning (scan and save unlimited books and articles) • Advanced AI analysis (intelligent insights on your reading) • Cloud sync (access your library across devices) • Feature requests (send in ideas and request improvements) Free Trial: We offer a 3-day free trial period for new users. During this trial, you have full access to all premium features. Your subscription will automatically begin after the trial period ends unless you cancel before the trial expires. Automatic Renewal: Your subscription will automatically renew unless you cancel at least 24 hours before the current subscription period ends. You can manage your subscription and turn off auto-renewal in your App Store account settings. Cancellation: You may cancel your subscription at any time through your App Store account. If you cancel during the trial period, you will not be charged. If you cancel after being charged, you will continue to have access until the end of your current billing period. We reserve the right to change the pricing, subscription terms, or benefits associated with in-app purchases. Any such changes will be communicated through the app or on our website. For a detailed breakdown of subscription options, including how to manage or cancel your subscription, please visit our Privacy Policy and Terms of Service pages: Terms of Service: http://tos-privacy.lucas-goldner.com/read-on/terms-of-service.html Privacy Policy: http://tos-privacy.lucas-goldner.com/read-on/privacy.html
ML_Engineering
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Become a machine learning engineer—starting exactly where you are. ML_Engineering is a complete interactive learning environment for iPhone, iPad, and Mac. Begin with basic arithmetic, examples, features, labels, and your first prediction baseline. Progress through Python, NumPy, pandas, statistics, feature engineering, classical machine learning, deep learning, computer vision, NLP, forecasting, recommendations, model serving, MLOps, monitoring, responsible ML, distributed training, LLM systems, and principal-level ML architecture. LEARN BY DOING • 40 structured courses from beginner to advanced • 400 substantive interactive lessons • 140 editable, syntax-highlighted code labs • 100 quizzes with validation and explanations • 80 architecture decisions based on production trade-offs • 80 guided concept exercises • Progressive hints that help without giving away the answer BUILD A SERIOUS ML PORTFOLIO Complete 40 practical projects: 12 Beginner, 14 Intermediate, and 14 Advanced. Build baselines, classifiers, forecasts, recommenders, vision and language models, feature stores, inference services, experiment systems, model registries, drift monitors, ML delivery pipelines, distributed training, LLM evaluation, governance controls, and a principal ML platform design. Every project includes an editable workspace, four milestones, checks, and outcomes you can explain in an interview. YOUR PRIVATE ML ENGINEERING TUTOR Ask from any lesson or project. Tutor Core can begin with basic arithmetic, define every new term, explain how models learn, diagnose code and architecture, and continue until the idea clicks. Offline Core is included and never sends questions anywhere. Compatible devices can add private Apple on-device generation. API, Ollama, and LM Studio connections are always optional. WATCH YOUR ML SYSTEM TAKE SHAPE Every completed lesson, course, and milestone advances a living ML-system construction scene—from problem framing and a baseline through features, training, serving, monitoring, and production guardrails. DESIGNED FOR SERIOUS PROGRESS Earn XP, build streaks, bookmark material, track role readiness, choose daily goals, switch between light and dark interfaces, and move naturally among iPhone, iPad, and Mac. FREEMIUM AND PRO Explore the first module of every course for free, keep your learning progress, and upgrade only when you are ready. ML_Engineering Pro unlocks the complete curriculum, every lab and portfolio project, and contextual Tutor access across iPhone, iPad, and Mac. Choose a monthly plan with a 14-day free introductory trial or an annual plan with a 7-day free introductory trial, when eligible. Prices are shown before purchase. Payment is charged to your Apple Account after confirmation. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Restore purchases or manage your subscription directly from the app. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://github.com/lukekevinmclaughlin-oss/ML_Engineering/blob/main/PRIVACY.md
Screenshots
Verdict
The clearest difference is update cadence: ReadOn at every 6 days against ML_Engineering's every 3 weeks. ML_Engineering's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement 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
Both are free to download. ReadOn sells 2 in-app purchases, starting at $4.99 per 7 days and ML_Engineering sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
ReadOn ships an update every 6 days, ML_Engineering every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | ReadOn | ML_Engineering |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone, iPad, Mac — better |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 72 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Lucas Goldner | Luke Mclaughlin |
In-app purchases
ReadOn
- Weekly3 Days trial$4.997 Days
- Yearly3 Days trial$24.991 Year
ML_Engineering
- ML_Engineering Pro14 Days trial$1.991 Month









