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Introduction
If you're like me and only find games fun when real skill based competition is involved, then this list is made for you. I will be covering games of all genre with a massive player base so you won't have a hard time finding any matches. Furthermore, since these are all multiplayer mobile games, I will not include any games that has even slightly pay to win elements. All games on this list are available on both Google and Apple app stores as of October 8, 2020. Now without further ado, here are 15 of the best competitive games out on iOS and Android with lots of active players, hope you enjoy!
PUBG Mobile
Mobile Legends: NEXT
Brawl Stars
Battlelands Royale
Critical Ops
Arena of Valor
Shadow Fight Arena
Vainglory
Among Us
Hearthstone
Catalyst Black
Super Mecha Champions
Brawlhalla
Call of Duty Mobile
Teamfight Tactics (TFT)
Oddly enough when I look back at it, I couldn't find any multiplayer racing, RPG with PvP, or RTS with PvP games on mobile that didn't have pay to win elements. Read below for more details on each game and see if they're right for you.
Also, if you do have suggestions on competitive F2P games that I've missed, please leave this article a comment with your thoughts!
PUBG Mobile

Genre: Battle Royale Shooter
Publisher: Bluehole
Mobile Platform: iOS and Android
Pay to Win: No
Average Match Length: 30 minutes
PUBG is one of the most popular games of all time. Featuring a comprehensive battle royale formula where 100 players are dropped into a battlefield and the last one standing is the victor. Sneak around or engage in full combat, the choice is yours.
Mobile Legends: NEXT

Genre: MOBA
Publisher: Moontoon
Mobile Platform: iOS and Android
Pay to Win: No
Average Match Length: 20-30 minutes
Mobile Legends is one of the most popular MOBA games on mobile devices with tons of heroes to choose from, high level skill plays, incredible ranking system and great communication tools to execute strategic game plays with your team.
Brawl Stars

Genre: Top down battle arena with various modes including Battle Royale.
Publisher: Supercell
Mobile Platform: iOS and Android
Pay to Win: No
Average Match Length: 3 minutes
Brawl Stars is made for fast paced combat and short length games. Players can choose from multiple modes in this top down shooting and skill based battle arena. Enter a match solo or with a pre-made team for 3v3 matches.
Battlelands Royale

Genre: Top-down Battle Royale
Publisher: Futureplay
Mobile Platform: iOS and Android
Pay to Win: No
Average Match Length: 5 minutes
Battlelands Royale is a unique take on battle royale games (think PUBG/Fortnite) but with a top down view and made for quick solo or duo games in a map with 32 players. Play strategically and take out your enemies to be the last one standing.
Critical Ops: Multiplayer FPS

Genre: First Person Shooter (FPS)
Publisher: Critical Force Ltd.
Mobile Platform: iOS and Android
Pay to Win: No
Average Match Length: 15 minutes
Critical Ops may be the closest thing you can get to Counter Strike on mobile. Compete in different modes such as Death match, Bomb Defuse and Gun Game. Work together with your team to secure victory!
Arena of Valor

Genre: MOBA
Publisher: Garena, Netmarble
Mobile Platform: iOS and Android
Pay to Win: No
Average Match Length: 12-18 minutes
Arena of Valor is one of the most popular MOBA featuring the destroy your enemy's turrets formula by working together with your team in various modes such as Grand Battle, Valley Skirmish and Abyssal Clash. AOV has a very close resemblance to League of Legends.
Shadow Fight Arena (See Our First Impressions)

Genre: 1v1 Fighting
Publisher: Nekki
Mobile Platform: iOS and Android
Pay to Win: No
Average Match Length: 5 minutes
Shadow Fight Arena is a competitive fighting game that focuses on tactics and strategy instead of button smashing. Choose from various fighters with unique styles and time your attacks and defences to defeat the enemy.
Vainglory

Genre: MOBA
Publisher: Super Evil Megacorp
Mobile Platform: iOS and Android
Pay to Win: No
Average Match Length: 5-20 min depending on the game mode.
Vainglory is a cross-platform MOBA title for both PC gamers and mobile gamers. Choose from over 56 heroes and play in many different battle modes in 5 on 5 matches. Engage in fast paced combat and strategic playstyles to secure victory!
Among Us

Genre: Social Strategy Survival
Publisher: Innersloth
Mobile Platform: iOS and Android
Pay to Win: No
Average Match Length: 2-10 minutes
Among Us is one of the most popular titles of 2020 due to the high level social value of this cross-platform game. Each match can have up to 10 players with crewmates and imposters. Crewmates try to survive and imposters try to take out your counterpart to win.
Hearthstone

Genre: Card Strategy
Publisher: Blizzard Entertainment
Mobile Platform: iOS and Android
Pay to Win: No
Average Match Length: 5-10 minutes
Based on the Warcraft lore, Hearthstone has been one of the most popular card games featuring cross-platform play and an in-depth game database of cards. Although micro-transactions can impact your card options, but a deep thinker can beat anyone with a beginner deck.
Catalyst Black (View Our Early Access Gameplay)

Genre: Top-down Arena Shooter
Publisher: Super Evil Megacorp
Mobile Platform: iOS and Android
Pay to Win: No
Average Match Length: no limit - based on drop-in drop-out system (DIDO)
Catalyst Black features a unique DIDO system making a perfect blend of casual and competitive gameplay. Play various modes of 10 vs 10 in this fast paced shooter. Progress through earning points by killing or completing objectives.
Super Mecha Champs

Genre: Anime Battle Royale
Publisher: NetEase
Mobile Platform: iOS and Android
Pay to Win: No
Average Match Length: 20-30 minutes
Super Mecha Champs is an anime battle royale game where you can play as a regular human or jump into a mech suit to defeat your enemies. The game is quite complex as you can shoot, use special abilities, fly, and do many other things.
Brawlhalla

Genre: 2D Platform Fighter
Publisher: Blue Mammoth Games
Mobile Platform: iOS and Android
Pay to Win: No
Average Match Length: 20 minutes
Choose from over 50 heroes in Brawlhalla and battle it out (like Super Smash Bros.) with up to 8 players in a match. The game is cross platform with PC, consoles and mobile so you can fight anyone from all around the world in this game of fast paced combat and chaos.
Call of Duty (COD) Mobile

Genre: First Person Shooter and Battle Royale
Publisher: Garena and Activision
Mobile Platform: iOS and Android
Pay to Win: No
Average Match Length: 7-10 minutes
Call of Duty M is one of the most played games on mobile of all time. Choose from many different load outs and weapon customisation to engage your enemies in combat across various modes. The game also has full controller support.
Team Fight Tactics (TFT)

Genre: Auto-Chess Strategy
Publisher: Riot
Mobile Platform: iOS and Android
Pay to Win: No
Average Match Length: 30-40 minutes
TFT is one of the most popular auto chess games featuring the League of Legends lore and cross-platform play. The game constantly goes through revamps so characters and team comp meta changes with each update creating more room for strategy and competition.
Conclusion
I hope this article has helped you figure out what your next competitive game will be. Keep in mind all of these games are completely free to play so you don't need to worry about advantages to players who spend money. Surprisingly, there weren't more competitive F2P games on mobile, but we are hoping 2021 will bring more games of this nature. As more games gets released, we will be adding them to this list.
For more information on the latest mobile games and guides, follow us on Instagram, YouTube, and Twitter. See you soon!