This is a ranking of the most popular mobile games by user count, based on the number of downloads, registered accounts, and/or monthly active users. See the list of most-played video games by player count for non-mobile games. Games released on mobile operating systems, primarily Android and iOS, are known as mobile games. 

1. Garena free fire 

Garena Free Fire, often known as Free Fire, is a battle royale game for Android and iOS created by 111dots Studio and released by Garena. In 2019, it became the most downloaded smartphone game in the world. In 2019, the Google Play Store awarded the game the "Best Popular Vote Game" honor. With over 80 million daily active users worldwide as of May 2020, Free Fire has achieved a new record. Free Fire has grossed over $1 billion worldwide as of November 2019.

Garena Free Fire is a third-person action-adventure battle royal game that is only available online.

Up to 50 players parachute onto an island in quest of weapons and equipment to kill the other players in a battle royal encounter. Players can choose their starting position and take weapons and supplies to help them last longer in battle.

Players enter a plane that travels over an island when they join a game. Players can jump wherever they wish while the plane is flying over the island, allowing them to choose a strategic landing spot away from opponents. After landing, the players must search for weapons and other useful objects. The island is littered with medical supplies, medium and large weaponry, grenades, and other objects. With a maximum of 50 players online, the players' ultimate goal is to survive on the island.

2. PUBG Mobile

PUBG Mobile (short for PlayerUnknown's Battlegrounds) is a free-to-play shooter battle royal video game created by Lightspeed & Quantum Studio, a part of Tencent Games, and licensed by Krafton.

As of March 2021, PUBG Mobile had amassed 1 billion downloads on Google Play and Apple App Store combined, grossing over $2.6 billion in 2020, making it the year's highest-grossing game and bringing its total income to $6.2 billion as of August 2021.

The game begins with the players flying in a plane over one of several different maps, which are also chosen prior to the match. Players pick where to parachute down as they go across the area. When the plane lands, a blue border forms around the island's perimeter, separating the safe zone from the external blue zone. Every few minutes, the safe zone shrinks, and everyone left in the blue zone will gradually lose health, maybe to the point of death. When the safe zone shrinks, the rate of health loss increases.

When players initially arrive on the island, they have no provisions. Instead, they must hunt their surroundings for guns, armor, vehicles, and more equipment, or steal them from players who have already been damaged. In general, more dangerous areas of the map have better weaponry and equipment.

3. Mobile Legends: Bang Bang

Moonton, a subsidiary of ByteDance, developed and distributed Mobile Legends: Bang Bang, a mobile multiplayer online battle arena (MOBA). The game, which was released in 2016, has gained popularity in Southeast Asia and was one of the titles selected for the first medal event esports competition at the 2019 Southeast Asian Games in the Philippines, which was given a $2.9 million settlement. 

Mobile Legends: Bang Bang is a mobile-optimized multiplayer online battle arena (MOBA) game. The two opposing teams compete for possession of a path, the three "lanes" known as "top," "middle," and "bottom," that connects the bases by reaching and destroying the enemy's base while defending their own. Weaker computer-controlled heroes known as "minions" spawn in team bases and fight adversaries and turrets as they follow the three lanes to the opposing side's base. 

4. Pokemon Go

Pokémon Go is an iOS and Android augmented reality (AR) mobile game developed and distributed by Niantic in conjunction with Nintendo and The Pokémon Company. It was one of the most popular and profitable smartphone apps in 2016, with more than 500 million downloads worldwide by the year's end. By May 2018, the game had over 147 million monthly active users, had over a billion global downloads, and had earned more than $6 billion in revenue. 

Players build and personalize their own avatars after creating a game account. The player's geographical position is used to display an avatar on a map. PokéStops and Gyms are usually found around tourist attractions. Players' avatars move about the game's map as they move around in the real world. Different Pokémon species can be found in various parts of the globe. When a player encounters a Pokémon, he or she has the option of viewing it in augmented reality (AR) or with a live rendered, generic background. If the player escapes, the Pokémon will return to the location where they were last engaged, with the exception of Nosepass, who will always face north due to its Pokédex record.

The player's mobile device's camera and gyroscope are used in AR mode to display an image of a Pokémon as if it were in the real world. With or without the AR feature turned on, players can take screenshots of the Pokémon they encounter. Players build and personalize their own avatars after creating a game account. The player's geographical position is used to display an avatar on a map. PokéStops and Gyms are usually found around tourist attractions. Players' avatars move about the game's map as they move around in the real world. Different Pokémon species can be found in various parts of the globe. When a player encounters a Pokémon, he or she has the option of viewing it in augmented reality (AR) or with a live rendered, generic background. If the player escapes, the Pokémon will return to the location where they were last engaged, with the exception of Nosepass, who will always face north due to its Pokédex record. The player's mobile device's camera and gyroscope are used in AR mode to display an image of a Pokémon as if it were in the real world. With or without the AR feature turned on, players can take screenshots of the Pokémon they encounter.

5. Subway Surfers

Kiloo and SYBO Games, both located in Denmark, collaborated on Subway Surfers, an endless runner smartphone game. It uses the Unity game engine and is accessible for Android, iOS, Kindle, and Windows Phone.

The video game Subway Surfers is an endless runner. The game begins by tapping the touchscreen as Jake (the game's initial character) or any other player paints graffiti on a subway and is then apprehended by the inspector and his dog, who chases the character down. To avoid colliding with impending obstacles such as moving subways, poles, tunnel walls, and barricades, the player can swipe up, down, left, or right while sprinting. More points can be earned by swiping quickly as the speed increases. A crash ends the game, although the player can keep running by pressing keys. Coins, keys, score multipliers, super shoes, jetpacks, magnets, mystery boxes, and power jumps are among the goods that the player can gather. 

A power jumper provides combustion by launching the character into the air, and a jetpack has the potential to fly. Other items include a coin magnet that draws all coins on the track, super sneakers that allow the player to jump higher, and a score multiplier that increases the score. A hoverboard, for example, allows the character to avoid collisions for up to 30 seconds.