Best 21Dev Apps & Games

131+ iOS apps & games curated and reviewed

4.0 avg rating

20 free apps & games

Updated June 2026

Looking for free 21dev apps and games? 20 of our 131+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top 21Dev Apps & Games (June 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	CFR AI - Title 21	Free	5.0★ (1)	No	Yes	Aug 2026
2	O-KAM Pro	Free	4.5★ (8.5K)	Yes	Yes	Sep 2026
3	TopTop: Games & Party	Free	4.9★ (6.5K)	No	Yes	Sep 2026
4	她说 \| 认真交朋友	Free	4.4★ (424)	Yes	Yes	Sep 2026
5	dev.to	Free	3.8★ (32)	No	No	May 2026
6	daily.dev	Free	4.3★ (39)	Yes	Yes	Aug 2026
7	ViViWo play meet & share	Free	3.2★ (61)	Yes	No	Jul 2026
8	Assemblr Studio: Easy AR Maker	Free	3.5★ (238)	No	Yes	Sep 2026

Top Picks for 21Dev

#1

CFR AI - Title 21 by Ryan Smerdon

Clinical Research Assistant

Editor's Choice

🏥 Medical

5.0(1 ratings)

FreeIn-App Purchases

CFR AI - Title 21 screenshot 1

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CFR AI - Title 21 screenshot 3

CFR AI - Title 21 screenshot 4

CFR AI - Title 21 screenshot 5

Navigate complex federal regulations with an AI-powered assistant. Get instant, accurate answers to your questions about Title 21 of the Code of Federal Regulations, covering drug development and clinical trials. Features include interactive chat, example questions, and new calendar and reminder functionalities.

#2

O-KAM Pro by Shenzhen VeePai IoT Intelligent Technology LLC

Strong Contender

🛠️ Developer Tools

4.5😊(8.5K ratings)

FreeAdsIn-App Purchases

#4in Developer Tools

O-KAM Pro screenshot 1

O-KAM Pro screenshot 2

O-KAM Pro screenshot 3

O-KAM Pro screenshot 4

O-KAM Pro screenshot 5

Monitor your home remotely with real-time video surveillance. Access cloud storage, receive alarm notifications, and communicate via two-way audio. Capture photos and videos for convenient home management.

What We Love

🚀 Convenient
🚀 Easy to use
🚀 Great picture quality
🚀 Excellent value

Room to Improve

🐛 Connectivity issues
🐛 Unreliable motion detection
🔋 Battery life concerns

#3

TopTop: Games & Party by MX INNOVATION PTE. LTD.

Play Games & Hang Together

Worth Considering

🎮 Games

4.9(6.5K ratings)

FreeIn-App Purchases

#9in Games

TopTop: Games & Party screenshot 1

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This app offers a variety of multiplayer games and social features for real-time interaction. Connect with friends or meet new people through engaging gameplay and voice chat rooms. Enjoy endless fun and build connections.

More 21Dev apps to explore

她说 | 认真交朋友

每天认识21位有趣好看的新朋友

This social app helps users build genuine connections, find romantic partners, make friends, and expand their professional network. It features a strict user review process and daily personalized recommendations of 21 real users to facilitate meaningful matches.

Genuine connection buildingDating and finding partnersFriend making

🌐 Social Networking

free with in-app purchases

Code Creators Coming Together

Explore and engage with a blogging-forward social network focused on code creators. Discover content, follow tags and members, and stay updated on the evolving Forem ecosystem.

Navigate Forem ecosystemFollow dev.to tags and membersDiscover Forem ecosystem content

🌐 Social Networking

Discover what's next

Get a personalized feed of developer news, articles, and discussions tailored to your interests. Discover new tools and insights across AI, React, DevOps, and more from thousands of sources.

Personalized developer feedAI-powered content curationCommunity discussions (Squads)

free with in-app purchases

ViViWo play meet & share

ViViWo play meet & share

ViViWo play meet & share

Chat & talk with new people

Explore a vibrant 3D city, connect with others through customizable avatars, and engage in a variety of activities. Attend events, play games, and interact with brands in a shared virtual space accessible from any device.

3D city explorationCustomizable avatarsVirtual apartment ownership

🌐 Social Networking

Assemblr Studio: Easy AR Maker

Assemblr Studio: Easy AR Maker

Assemblr Studio: Easy AR Maker

Easy Augmented Reality Maker

Create immersive augmented reality experiences without any coding. Utilize a drag-and-drop editor with thousands of 3D objects, animations, and interactive elements. Share your AR projects easily across various platforms.

Drag-and-drop AR editorThousands of 2D & 3D objectsAdd animations and interactivity

🎨 Graphics & Design

free with in-app purchases

by Changsha Xingyue Interactive Network Technology Co., Ltd

Discover trending short dramas from around the world, including romance, suspense, and slice-of-life genres. This app offers a user-friendly interface and smart recommendations to help you find captivating stories anytime, anywhere.

Trending short dramasGlobal content collectionRomantic love stories

free with in-app purchases

How Well Do You Know Me

How Well Do You Know Me

How Well Do You Know Me

Do You Know Me?

Discover how well you know your partner or friends with this interactive quiz game. Answer a series of questions and then have your partner or friend try to match your responses to calculate your compatibility score. It's a fun way to test your understanding of each other's feelings.

Partner compatibility quizFriendship test gameAnswer matching questions

free with in-app purchases

Gamification 3D Design App

This app makes 3D printing accessible for home users with its one-press printing technology. It offers a user-friendly experience, allowing you to focus on the creative process of bringing your designs to life through 3D printing.

User-friendly 3D printingOne-press printing technologyHome 3D design

free with in-app purchases

Infinite Cultivation

Infinite Cultivation

Infinite Cultivation

Xuanhuan idle cultivation game

Embark on a journey of immortal cultivation in this idle social game. Alchemy, planting, and home building are just the beginning. Experience tribulations, ascend to new heights, and forge powerful artifacts. Join sects, learn skills, and discover hidden treasures.

Casual & Idle gameplayTribulation & Ascension systemTreasure hunting & Alchemy

free with in-app purchases

掼蛋-如意掼蛋单机欢乐版惯蛋

经典单机爱掼蛋游戏，天天趣味惯蛋王

Experience authentic Jiangsu Huai'an card game gameplay. Develop unique partners with special abilities to assist you in challenging scenarios. Embark on a national journey, overcome obstacles, and enjoy exciting game variations for enhanced fun.

Authentic Jiangsu Huai'an gameplayPartner development with unique abilitiesStory mode with national travel

free with in-app purchases

TrueID: #1 Smart Entertainment

TrueID: #1 Smart Entertainment

TrueID: #1 Smart Entertainment

Lifestyle & Entertainment

Discover personalized content, including trending stories and exclusive dramas. Stream popular movies, series, and animations from Asia, with live TV options. Shop for lifestyle items and redeem exclusive rewards.

Personalized content feedsExclusive short dramasAsian series and movies

🎬 Entertainment

free with in-app purchases

LetStudy Live Streaming Video

LetStudy Live Streaming Video

LetStudy Live Streaming Video

Access thousands of video courses taught by expert instructors on a wide range of topics, from programming to personal development. Learn new skills, advance your career, or explore hobbies with lifetime access to course content and offline learning options.

Thousands of video coursesExpert instructorsLifetime access to content

🎬 Entertainment

free with in-app purchases

Alist、OpenList、网盘管理、文件管理、视频播放器

$9.99 | 100% OFF

This app acts as a media player powered by Alist, allowing users to manage and stream content from various cloud storage services. It offers seamless synchronization across Apple devices and robust file management capabilities. Enjoy a wide range of supported video, audio, and subtitle formats with advanced playback features.

Alist-driven media playbackSupport for multiple cloud drivesiCloud data synchronization

📊 Productivity

free with in-app purchases

2000 AD Featuring Judge Dredd

2000 AD Featuring Judge Dredd

2000 AD Featuring Judge Dredd

by Rebellion 2000 AD

Explore vast comic universes featuring iconic characters like Judge Dredd and Rogue Trooper. Access over 1800 comic books and graphic novels with free peeks and offline reading. Subscribe for exclusive offers and DRM-free downloads.

Infinite comic universesIconic character libraryOver 1800 comic books

free with in-app purchases

Tru Count - Blackjack Trainer

Tru Count - Blackjack Trainer

Tru Count - Blackjack Trainer

by Phoenix AI Consulting LLC

Master blackjack strategy with this professional training app. It offers interactive practice, strategy charts, and card counting tools for all skill levels. Track your progress and practice offline to perfect your game.

Interactive practice mode with instant feedbackComprehensive strategy chartsCard counting trainer (Hi-Lo system)

ZingPlay Games: Shan, 13Poker

ZingPlay Games: Shan, 13Poker

ZingPlay Games: Shan, 13Poker

Game portal with diverse games

This app offers a diverse collection of card and fishing games, allowing users to play anytime, anywhere without installing multiple applications. It fosters a competitive community and provides daily rewards for an engaging gaming experience.

Play multiple games in one appPopular Myanmar card gamesEngaging fishing game

free with in-app purchases

4D King Live 4D Results

4D King Live 4D Results

4D King Live 4D Results

Get live updates for 4D and Jackpot lottery results across Malaysia, Singapore, and Southeast Asia. This app offers real-time notifications, past draw history, and support for multiple languages and devices.

Live 4D & Jackpot resultsReal-time updatesPast draw history

FAQ about 21Dev

What are the best 21dev apps & games for iPhone?

CFR AI - Title 21 tops our 21dev apps & games ranking as of June 2026, with a 5.0-star average from 1 App Store ratings, and it's free to download.

Are there free 21dev apps & games for iPhone?

Yes — 20 of the top 21dev apps & games we rank are free to download, including CFR AI - Title 21 and O-KAM Pro.

Does CFR AI - Title 21 have ads or in-app purchases?

CFR AI - Title 21 has no ads and offers in-app purchases, according to its App Store listing as of June 2026.

How many 21dev apps & games are on the App Store?

We track 131+ 21dev apps & games on the iOS App Store as of June 2026, ranked by rating, recency, and analysis of real user reviews.

What is CFR AI?

CFR AI is a subscription-based application designed to help professionals navigate Title 21 of the Code of Federal Regulations. It uses advanced AI to provide instant, accurate answers to questions related to drug development, clinical trials, and FDA regulations.

What are the subscription options for CFR AI?

CFR AI offers several subscription plans: a weekly plan for $0.99, a monthly plan for $3.99, a bi-annual plan for $23.99, and an annual plan for $45.99. All plans include a 3-day free trial.