Comparison

DevTutor vs Java Prep

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

Head to head
About

DevTutor

Learn to build apps with SwiftUI using replicable code samples and real-time UI previews. Access official Swift documentation offline in English and Chinese, and explore third-party packages.

Highlights
  • Replicable code samples
  • Real-time UI previews
  • Offline Swift documentation (EN/ZH)
  • Third-party package exploration
  • SwiftUI learning resources
Features
Read full description

"DevTutor" is an application designed to assist developers in creating exceptional apps using SwiftUI. It offers replicable code samples and corresponding UI previews to streamline your coding process. Additionally, it includes local offline access to the official Swift Programming Language documentation in both Chinese and English. ——————————— ◈ Main Features ◈ ——————————— ■ Provide sample code that can be used directly in your project ■ View in real time how your code affects the appearance of the application ■ Provide official bilingual Chinese and English Swift programming language documentation for offline use ■ Explore a collection of third-party packages ■ And more features... ——————————— ◈ Policies & Terms ◈ ——————————— For Privacy Policy, please visit: https://wangchujiang.com/devtutor/privacy-policy.html For Terms of Service, please visit: https://wangchujiang.com/devtutor/terms-of-service.html ——————————— ◈ Contact Me ◈ ——————————— Contact us at kennyiseeyou@gmail.com if you have any problems or questions.

About

Java Prep

Features
Read full description

Java Interview Guide is your ultimate companion for mastering Java interviews. It offers a curated collection of common interview questions, detailed answers, and practical examples covering core Java, data structures, algorithms, Spring, multithreading, databases, and more. Whether you're preparing for your first job or aiming for a top tech company, this app helps you review efficiently, practice smart, and stay confident. --I hope every job seeker can find a job that satisfies them [Java Interview Guide – Auto-Renewing VIP Subscription Terms] — VIP Membership Benefits: Subscribing unlocks full access to all interview question types, including intermediate and advanced questions, real-world scenarios, questions from top tech companies, system design topics, web-related questions, and ongoing content updates. Enjoy unlimited access with no ads. — Subscription Plans & Pricing: Java Interview Guide – Monthly VIP Membership (Auto-Renewing): US$0.99/month (renews automatically every month), with a 7-day free trial. Java Interview Guide – Quarterly VIP Membership (Auto-Renewing): US$2.99/quarter (renews automatically every 3 months), with a 7-day free trial. Java Interview Guide – Semi-Annual VIP Membership (Auto-Renewing): US$5.99/half-year (renews automatically every 6 months), with a 7-day free trial. — Payment Terms: Payment will be charged to your Apple ID account upon confirmation of purchase. Your subscription will automatically renew and be charged within 24 hours prior to the end of the current billing period. You can manage and cancel your subscription in your Apple ID account settings. — Free Trial Policy: A 7-day free trial is available for first-time subscribers. If you cancel during the trial period, you won’t be charged. You may continue using the service until the end of the trial. — How to Cancel Auto-Renewal: To avoid automatic renewal, cancel at least 24 hours before the current period ends. Go to: Settings > Apple ID > Subscriptions and turn off auto-renew. — Privacy Policy & Terms of Use: Privacy Policy: https://blog.csdn.net/MyEclipse927/article/details/133379708?spm=1001.2014.3001.5501 Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

DevTutor4 screens
Java Prep4 screens

Verdict

The call

The clearest difference is update cadence: DevTutor at every 2 weeks against Java Prep's every 6 weeks. 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. DevTutor sells 3 in-app purchases, starting at $1.99 per month and Java Prep sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

DevTutor ships an update every 2 weeks, Java Prep every 6 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard1 real difference · 9 level
DevTutor versus Java Prep: the parameters behind the verdict, then further details
ParameterDevTutorJava Prep
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews87.5% of reviews—
Number of ratings2 — better—
Update frequencyEvery 2 weeks — betterEvery 6 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS17.016 — better
Further details — not scored
Size155 MB17 MB
Age rating4+9+
Developer楚江 王嘉 邱

In-app purchases

3 purchases

DevTutor

Subscriptions2
  • All Access Monthly$1.991 Month
  • All Access Annually$9.991 Year
One-time1
  • All Access Lifetime$49.99
3 purchases

Java Prep

Subscriptions3
  • Monthly Membership7 Days trial$0.991 Month
  • Quarterly Membership7 Days trial$2.993 Months
  • Semi-Annual Membership7 Days trial$5.996 Months

Questions

Is DevTutor free?
DevTutor is free to download, with in-app purchases available.
Is Java Prep free?
Java Prep is free to download, with in-app purchases available.
Do DevTutor or Java Prep have ads?
Neither DevTutor nor Java Prep shows ads.
Which is updated more often, DevTutor or Java Prep?
DevTutor ships an update every 2 weeks, and Java Prep every 6 weeks. Most recently, DevTutor was updated on November 3, 2026 and Java Prep on October 30, 2026.

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