Why games on Android slow down and how to fix it: a complete guide

Lags, stuttering and low FPS in mobile games are one of the most common problems on Android devices. Even on flagship smartphones like Samsung Galaxy S23 Ultra or ASUS ROG Phone 7 games can stutter, not to mention budget models like Redmi Note 12 or Realme 9i. The reasons for the brakes lie not only in “weak hardware,” but also in incorrect system settings, overloaded memory, or even in the games themselves.

In this article we will analyze all possible ways to eliminate lags —from basic (clearing the cache, closing background processes) to advanced (overclocking processor, changing screen resolution via ADB). You will learn how to check what exactly is slowing down the game, what graphics settings to choose for maximum performance, and when to think about upgrading your device. And if you play on an emulator, there are a couple of useful life hacks for you too.

Important: some methods require root access or activation Developer mode. If you are not ready to experiment, focus on the “safe” methods from the first sections.

1. Diagnostics: why exactly does the game slow down?

Before optimizing the system, you need to understand the root of the problem. There are three types of brakes in games on Android:

• 🔄 Lags due to the processor/GPU — the game “freezes” for 1-2 seconds, then continues. The culprit is usually thermal throttling (frequency reset due to overheating) or insufficient chipset power.
• 📉 Low FPS —the picture moves jerkily, but without freezing. Graphics problem: high resolution, shadows enabled or lack of video memory.
• 🐢 General slowdowns —the game interface and system respond with a delay. Reason: lack of RAM or background processes.

To determine the bottleneck, use the built-in tools:

1. Start the game and call Developer panel (if enabled in the settings). Look at the graphs CPU and GPU —if the load is close to 100%, the problem is in the hardware.
2. Install the application GameBench (free for Android). It will show real FPS, CPU load and device temperature during the game.
3. Check free memory: go to Settings → Memory. If less than 1 GB is free, the system slows down due to lack of resources.

Critical moment: if the processor temperature exceeds 65°C, a forced reduction in frequencies is activated. In this case, no settings will help until the phone cools down. thermal throttling — forced reduction of frequencies. In this case, no settings will help until the phone cools down.

2. Basic Android optimization for games

Start with simple actions that do not require root access or complex manipulations. These methods are suitable for 90% of users and will give a noticeable increase in performance.

Clearing cache and game data

Over time, games accumulate temporary files that can take up gigabytes of memory and slow down loading levels. To clear the cache:

1. Go to Settings → Applications → [Game name].
2. Click Storage → Clear cache.
3. If the game is still the same slows down - try Clear data (will delete progress, so link your account first!).

Closing background processes

Android limits the background activity of applications, but some apps (messengers, launchers) can “steal” resources. How to free up memory:

• 🛑 Press the button Recent applications and close everything except the game.
• 🔄 Enable Game mode (available on Xiaomi, Samsung, ASUS) - it blocks notifications and background tasks.
• ⚡ Disable autorun of unnecessary applications in Settings → Applications → Autorun.

Disable animations and visual effects

System animations consume up to 10-15% of processor power. To disable them:

1. Activate Developer mode (click 7 times on Build number in Settings → About phone).
2. Go to Settings → System → For developers.
3. Install Window animation scale, Transition animation scale and Animator duration on Off.

⚠️ Attention: Some games (for example, Genshin Impact or Honkai: Star Rail) require a constant Internet connection. Disabling mobile data will result in a connection error.

3. Graphics settings: how to increase FPS without losing quality

Many games allow you to manually adjust graphics, but not all settings have the same effect on performance. Here's what's really important:

Parameter	Impact on FPS	Recommendation
Resolution	⭐⭐⭐⭐⭐	Install 720p or 900p (even on Full HD screens). The difference in the picture is minimal, and the FPS increase is up to 30-40%.
Texture quality	⭐⭐	Leave it at Medium. Low will make the game “soapy”, and high will have almost no effect on FPS.
Shadows	⭐⭐⭐⭐	Disable or enable Low. Shadows load the GPU heavily, but are almost unnoticeable in dynamic games.
Particle effects	⭐⭐⭐	Reduce to Medium. Explosions and smoke look beautiful, but eat up resources.
V-Sync	⭐	Disable! V-Sync synchronizes FPS with the screen frequency, but adds input lag.

Example of optimal settings for Call of Duty: Mobile on an average smartphone (Snapdragon 730G, 6 GB RAM):

• Resolution: Smooth (720p)
• Graphics quality: Low
• FPS: Very High (FPS priority over graphics)
• Shadows: Off
• Depth effects: Off

For PUBG Mobile or Free Fire use similar settings, but enable Extreme FPS (if available) - this will forcefully limit the graphics for the sake of smoothness.

4. Advanced methods: overclocking, undervolting and ADB commands

If the basic methods did not help, it’s time to move on to the “heavy artillery”. These methods require more time and sometimes root accessbut give the maximum effect.

Overclocking the processor through the core

On some devices (for example, on POCO F3 or Realme GT Neo 2) you can increase the CPU/GPU frequency using custom kernels or applications like Kernel Auditor (root required). Danger: overheating and shortening the life of the chipset.

A safe alternative is undervolting (reducing the voltage on the processor). This reduces heat and allows you to maintain high frequencies longer. To do this:

1. Set EX Kernel Manager (root).
2. In the section CPU Voltage reduce the voltage by 25-50 mV for each frequency.
3. Check stability in 3DMark or Geekbench.

Changing screen resolution via ADB

Android allows you to force change the screen resolution for a specific application. This is useful if the game doesn't let you choose 720p in the settings. Instructions:

adb shell wm size 1080x2280 # For devices with a resolution of 1080x2400 (for example, Samsung Galaxy S22)
adb shell wm density 420 # Pixel density (select for your screen)

After applying the command, the game will be render at a lower resolution, but stretch to fit the screen. Minus: a little “soapy” picture, but FPS will increase by 20-30%.

Disabling performance limitations

Some manufacturers (for example, Huawei or Xiaomi) artificially limit performance to save battery. To remove restrictions:

• On Xiaomi/Redmi/POCO: go to Settings → Accessibility → MIUI Optimization and disable it.
• On Huawei/Honor: in Settings → Battery → Launch applications install for the game No restrictions.
• On Samsung: add the game in Game launcher and enable the option Max Performance.

What is thermal throttling and how to avoid it?

Thermal throttling is an automatic reduction in processor frequencies when overheated. On most smartphones it works at a temperature of 65-70°C. To avoid throttling:

- Use a cooling pad or fan.

- Play in a cool room (air temperature < 25°C).

- Remove the phone case while playing.

- Turn down the brightness screen up to 50-60% (the display gets very hot).

⚠️ Attention: Overclocking the processor and changing the voltage can lead to loss of warranty and damage to the device. If you are not sure of your actions, skip this section.

5. Optimization for weak smartphones (2-4 GB of RAM)

If your phone is older than 2019 or is equipped with a chipset Snapdragon 660/Helio G80, you will have to sacrifice graphics for the sake of stability. Here's what works on budget devices:

• 🎮 Use cloud gaming: Xbox Cloud Gaming, NVIDIA GeForce NOW or Booster (from My.Games). The game runs on the server, and the phone only broadcasts the picture.
• 🔧 Install GLTools (root) - the app forcibly reduces the resolution and texture quality for all games.
• 📱 Try it light versions popular games: PUBG Mobile Lite, Free Fire Max, Call of Duty: Mobile Lite (if available in your region).
• ⚡ Disable Live Wallpaper and widgets - they take up to 500 MB of RAM in the background mode.

For devices with 2 GB RAM (for example, Redmi 5A or Samsung Galaxy J4) the only real way to play modern projects is cloud gaming or emulators of old games (for example, PPSSPP for PSPgames).

If even after all the manipulations the game slows down, check it on another device. Perhaps the problem is in the game itself (for example, poor optimization Diablo Immortal on some chipsets).

6. Cooling your phone: how to avoid thermal throttling

Overheating is the main cause of sudden lags in games. When the processor temperature reaches 70-75°C, protection is triggered and performance drops by 30-50%. How to avoid this:

Passive cooling

• 🧊 Use cooling case with a metal plate (for example, from Black Shark or Razer).
• 🌬️ Point at the phone regular fan - this will reduce the temperature by 5-10°C.
• ☀️ Do not play in direct sunlight or in a stuffy room.

Active cooling

For hardcore gamers there are special coolers:

• 🔥 Black Shark FunCooler Pro — liquid-cooled fan (-15°C temperature).
• ❄️ ASUS ROG Phone Cooling Dock — docking station with active cooling.
• 💧 Thermaltake Mobile Cooling Stand — stand with water cooling (for long sessions).

If there is no cooler, you can use ice (wrapped in a towel!) or gel pack from the first aid kit. The main thing is not to put ice directly on the case so as not to damage the battery.

Software cooling methods

Some applications help control heating:

• Coolify (root) - forcibly reduces processor frequencies when overheated.
• CPU Monitor - monitors temperature and core load in real time.
• Greenify - “freezes” background processes, reducing the load on system.

⚠️ Attention: If the phone regularly heats up above 70°C, this may indicate malfunction. battery or dry thermal paste (on older devices) only a service center will help.

7. Emulators and games on PC: how to avoid lags

If you play on Android through an emulator (BlueStacks, LDPlayer, MuMu Player), the brakes may be related to the settings of the virtual machine. emulator:

Parameter	Recommendation
Processor	Select 2-4 cores (depending on the power of the PC).
RAM	4-6 GB (at least 50% of the physical memory of the PC).
Graphics	Enable ASTC textures and Hardware acceleration (OpenGL/DirectX).
Resolution	Set 1280x720 (even if the monitor is 4K).
FPS	Limit to 60 or 120 (depending on the monitor).

Additional tips for emulators:

• 🖥️ Close all background apps on your PC (especially the browser with open tabs).
• 🔌 Connect the emulator to the network via Ethernet cable (Wi-Fi adds latency).
• 🔄 Enable High performance mode in Windows power settings.
• 🎯 Use KSOM (Kernel-based Screen Orientation Manager) to reduce input lag.

If the game is still slow, try a different emulator. For example, LDPlayer is better optimized for Free Fire, and MuMu Player for Call of Duty: Mobile.

8. When is it time to change your phone?

If you have tried all the methods, but games are still lagging, your device may simply be morally outdated. Here are the signs that it’s time to think about an upgrade:

• 📱 Your smartphone Released before 2018 (chipsets Snapdragon 625, Helio P20, Exynos 7885).
• 🎮 Even in Among Us or Brawl Stars FPS drops below 30.
• 🔋 The battery holds a charge for less than 2 hours in games (a sign of wear).
• 🔥 The phone heats up to 80°C in 10 minutes of play.
• 🚫 The manufacturer no longer releases updates Android (no support for new games).

Minimum requirements for comfortable gaming in 2026:

• 📌 Chipset: Snapdragon 730G/Dimensity 900 or higher.
• 📌 RAM: 6 GB (8 GB for multitasking).
• 📌 Screen: 90 Hz or 120 Hz (for smoothness).
• 📌 Battery: from 4000 mAh (for long sessions).

If your budget is limited, pay attention to gaming smartphones:

- POCO F5 (~30 000 ₽, Snapdragon 7+ Gen 2),

- RedMagic 8S Pro (~60,000 ₽, active cooling),

- Realme GT Neo 5 (~35 000 ₽, Snapdragon 8+ Gen 1).

Any smartphone is suitable for cloud gaming with a good screen and stable Internet (from 50 Mbit/s).

FAQ: Frequently asked questions about lags in games on Android

🔹 Why does the game slow down only on my phone, but it works fine on my friends?

There may be several reasons:

• You have a different version of the chipset (for example, Exynos instead of Snapdragon v Samsung).
• Friends play on lower graphics settings.
• Your phone is overheating (check the temperature in CPU Monitor).
• You have a pirated or modified version of the game installed.

Try resetting the game settings to standard and compare performance.

🔹 How to check how much FPS the game produces?

There are several ways:

• Enable the built-in FPS counter (available in Call of Duty: Mobile, PUBG Mobile, Genshin Impact).
• Use GameBench (shows FPS, loading CPU/GPU, temperature).
• For emulators, enable FPS display in the settings (Settings → Engine → Show FPS).

Normal values: 30 FPS - playable, 60 FPS - smooth, 90+ FPS - ideal (for screens with high refresh rates).

🔹 Is it possible to play heavy games on a weak phone without lags?

Technically yes, but with serious with reservations:

• Use cloud gaming (Xbox Cloud, GeForce NOW).
• Install light version games (if available).
• Play via streaming (for example, Parsec from a powerful PC).
• Reduce the screen resolution via ADB to 480p (the picture will be very bad).

In practice, comfortable gaming on weak smartphones is only possible in old or casual games.

🔹 Why did games start to slow down after updating Android?

Updates often bring new bugs or change resource management policies. Possible reasons:

• The new version of Android limits background activity (for example, Android 12+ aggressively closes processes).
• The manufacturer has added energy-saving settings (as on MIUI 14).
• GPU drivers have become less optimized (a common problem on Mali-G7x chipsets).

Solutions:

• Roll back to the previous firmware version (if you have a backup).
• Reset the phone settings to factory settings.
• Write to manufacturer support - sometimes they release patches.

🔹 Which Android emulator is the fastest for games?

The speed of the emulator depends on the game and PC configuration, but in 2026 the leaders are:

• For weak PCs: LDPlayer 9 (lightweight, well optimized).
• For powerful PCs: MuMu Player X (supports 144 FPS and DirectX 12).
• For MMO: BlueStacks 5 (stable, but requires a lot of RAM).
• For console emulation: RetroArch (for PS2, PSP, Nintendo DS).

Tip: always allocate to the emulator separate processor core in the settings.