Best Solutions 21 Apps & Games

155+ iOS apps & games curated and reviewed

4.1 avg rating
19 free apps & games
Updated June 2026

With an average user rating of 4.1โ˜…, the solutions 21 category is one of the App Store's strongest. Browse all 155+ apps and games we track, sorted so the most loved ones surface first.

Top Picks for Solutions 21

Blackjack-black jack 21 casino#2
4.4๐Ÿ˜(622 ratings)
FreeIn-App Purchases
Blackjack-black jack 21 casino screenshot 1
Blackjack-black jack 21 casino screenshot 2
Blackjack-black jack 21 casino screenshot 3
Blackjack-black jack 21 casino screenshot 4

Play the most popular Blackjack game on your iPhone or iPad. Compete against the dealer to win by getting 21 without going bust. Enjoy theme-specific cards, HD graphics, interactive gameplay, and more. Download now for a fun and engaging Blackjack experience!

What We Love

  • ๐Ÿ‘ Fun and interesting game
  • ๐ŸŽจ Great graphics and visuals
  • โฑ๏ธ Good time killer
  • ๐ŸŽ“ Helpful for learning blackjack

Room to Improve

  • ๐Ÿค– Dealer seems to get unrealistic hands
  • ๐Ÿ’ฐ Easy to run out of chips
  • ๐Ÿ•ฐ๏ธ Slow performance after updates
10-21 Police Phone#3

10-21 Police Phone by Motorola Solutions, Inc

Calling For Law Enforcement
Worth Considering
๐Ÿ”ง Utilities
3.7๐Ÿ˜(196 ratings)
FreeAdsIn-App Purchases
10-21 Police Phone screenshot 1
10-21 Police Phone screenshot 2
10-21 Police Phone screenshot 3
10-21 Police Phone screenshot 4
10-21 Police Phone screenshot 5
10-21 Police Phone screenshot 6

A top-rated law enforcement app that serves as a comprehensive tool for officers in the field, providing essential features to enhance their job performance and efficiency. Join thousands of law enforcement professionals who have hailed it as the best in its category.

What We Love

  • ๐Ÿ”’ Privacy protection - keeps personal number hidden from citizens
  • ๐Ÿ“ž Increases answer rates - real numbers get more responses than blocked calls
  • ๐Ÿ‘ User-friendly interface - easy to use and navigate
  • ๐Ÿ’ผ Professional separation - maintains work/personal boundary

Room to Improve

  • ๐Ÿ› Frequent call connection failures - calls won't connect or drop unexpectedly
  • ๐Ÿ”Š Poor audio quality - voice cuts out, distorted, or garbled
  • ๐Ÿ› App crashes - causes phone to restart or requires force closing

More Solutions 21 apps to explore

4
21 Day Container Tracker
21 Day Container Tracker
21 Day Container Tracker
Calorie & Body Weight Fix
Free

Track your daily calorie intake with ease using color-coded containers for different food groups over 21 days. Stay on top of your nutrition goals effortlessly! Start your healthy eating journey today and feel the difference.

๐Ÿ’ช Health & Fitness
(509)
5
Instant Buttons Soundboard Pro
Instant Buttons Soundboard Pro
Instant Buttons Soundboard Pro
Funny Memes Sounds & Effects
Free

Instant Buttons Soundboard Pro is a hilarious app that lets you play various funny meme sounds at the touch of a button. Spice up your conversations with these sound effects and bring laughter to your friends' faces!

๐ŸŽฌ Entertainment
(1.2K)
6
BlackJack: 21 Casino Table
BlackJack: 21 Casino Table
BlackJack: 21 Casino Table
BlackJack 21 Card Game
Free

Experience the thrill of mastering BlackJack with this offline card game that challenges you to get as close to 21 as possible. Play risk-free, learn the game, and hone your skills to dominate the tables. Download now and start your BlackJack journey today!

๐ŸŽฎ Games
(8)
7
Century 21 1st Choice Realty
Century 21 1st Choice Realty
Century 21 1st Choice Realty
by QuickLinkt Solutions Inc.
Free
๐Ÿ’ผ Business
(0)
8
Scan21 โ€“ Age ID Check
Scan21 โ€“ Age ID Check
Scan21 โ€“ Age ID Check
Age Finder and Quick ID Verify
$1.99
๐Ÿ› ๏ธ Developer Tools
(0)
9
Big Ideas Math Solutions
Big Ideas Math Solutions
Big Ideas Math Solutions
by Big Ideas Learning, LLC
Free
๐Ÿ“š Education
(106)
10
C21 Green - Home Search
C21 Green - Home Search
C21 Green - Home Search
Homes for sale and sold prices
Free
๐ŸŒŸ Lifestyle
(0)
11
21Moves | Cube Puzzle Solver
21Moves | Cube Puzzle Solver
21Moves | Cube Puzzle Solver
How to Solve a 3x3 Magic App
Free

Learn to solve your Rubik's Cube with 21Moves AI Solver app. Get step-by-step instructions and visual guides to become a puzzle-solving pro in under 3 minutes, with features like cube scanning, quick cube solving, cube fixing, and puzzle skill building. Download now and impress with your Rubikโ€™s cube solving skills!

๐Ÿ”ง Utilities
(58K)
12
OZON: ั‚ะพะฒะฐั€ั‹, ะพะดะตะถะดะฐ ะธ ะพะฑัƒะฒัŒ
OZON: ั‚ะพะฒะฐั€ั‹, ะพะดะตะถะดะฐ ะธ ะพะฑัƒะฒัŒ
OZON: ั‚ะพะฒะฐั€ั‹, ะพะดะตะถะดะฐ ะธ ะพะฑัƒะฒัŒ
ะœะฐั€ะบะตั‚ะฟะปะตะนั ั ะฒั‹ะณะพะดะฝั‹ะผะธ ั†ะตะฝะฐะผะธ
Free

Ozon is a leading online marketplace in Russia that offers a vast selection of products, including electronics, clothing, household items, and more. With features like 24/7 availability, discounts, and convenient delivery options, the Ozon app provides a seamless and cost-effective shopping experience for customers across the country.

๐Ÿ›๏ธ Shopping
(49K)
13
GlowIN 21 Skincare Beauty
GlowIN 21 Skincare Beauty
GlowIN 21 Skincare Beauty
by Bluevy Web Solution
Free
๐Ÿ’ช Health & Fitness
(0)
14
Label Expert
Label Expert
Label Expert
Professional label solutions
Free

Experience professional label printing with this software, allowing you to print PDFs, images, and custom templates with ease. Get organized and efficient with Label Expert today!

๐Ÿ”ง Utilities
(748)
15
Socratic AI - Homework Helper
Socratic AI - Homework Helper
Socratic AI - Homework Helper
Scan Math Solver
Free

Get fast, accurate homework help with an AI-powered app that solves math problems and more. Snap a picture of your question and receive step-by-step solutions across all subjects instantly. Transform your homework experience - download now!

๐Ÿ“š Education
(5.1K)
16
Camera Math Solver - UpStudy
Camera Math Solver - UpStudy
Camera Math Solver - UpStudy
photo math solver
Free

Get instant help with your homework across various subjects like Mathematics, Chemistry, Physics, and Biology with UpStudy's AI-powered camera math solver. Snap a photo of your problem to receive step-by-step solutions and explanations. Join the community, access real tutors, and deepen your understanding effortlessly.

๐Ÿ“š Education
(1.1K)
17
Algebrator: Step Math Solver
Algebrator: Step Math Solver
Algebrator: Step Math Solver
Solutions for Algebra Problems
Free

Get step-by-step solutions for algebra problems with an easy-to-use math solver app. Whether you need help with math homework or want to better understand algebra, Algebrator helps you solve equations, inequalities, graph functions, and more. Download now for a seamless math-solving experience!

๐Ÿ“š Education
(48)
18
FastMath - Take Photo & Solve
FastMath - Take Photo & Solve
FastMath - Take Photo & Solve
AI Math Problem Solver
Free

FastMath is a powerful math-solving app that lets you snap a photo of a math problem and receive instant step-by-step solutions. Say goodbye to tedious calculations and try FastMath today!

๐Ÿ“š Education
(51K)
19
SolveLab AI - Smart & Fast
SolveLab AI - Smart & Fast
SolveLab AI - Smart & Fast
Photo Solver & Life Utilities
Free

This all-in-one calculator app is designed for everyday use, offering a range of features including unit and currency conversion, photo problem solving, scientific calculations, and handwriting recognition, as well as utilities for tracking date differences and calculating BMI. Get instant step-by-step solutions and smart assistance for numbers and daily tasks with this convenient and comprehensive tool.

๐Ÿ”ง Utilities
(498)
20
Card Adder 21
Card Adder 21
Card Adder 21
Card Adding Mental Training
Free
๐ŸŽฎ Games
(1)