Last updated: October 10, 2026
fast dev studio (“we”, “us”, “our”) develops and provides Knife Reflex: Throw & Hit (“the Game”), Android package com.fastdevstudio.knifereflex.
This Privacy Policy explains how information is collected, used, stored and shared when you use the Game.
The Game stores information locally to maintain your progress and preferences, including:
Level progress and gameplay records.
Owned and selected knives.
Crystal balances and collection totals.
Achievement progress and winning streaks.
Game settings and preferences.
Purchasing knives with in-game crystals does not involve payment-card transactions.
The Game does not require a separate fast dev studio account. Google Play Games synchronization is not a complete cloud backup of your crystal balance, inventory or settings.
The Game uses Google Play Games Services for achievements and leaderboards. Depending on your Google settings, it may connect automatically when you launch the Game.
When connected, the Game can access your game-specific player ID and player name and synchronize achievements and leaderboard scores, including:
Highest completed level.
Best winning streak.
Crystals collected through gameplay.
Your player name and leaderboard activity may be visible to other players according to your Google Play Games settings.
We do not receive your Google password. You can manage your Play Games profile and game data through Google's settings.
The Game uses Google AdMob to display banner advertisements and optional rewarded advertisements.
Rewarded advertisements allow you to receive an in-game benefit, such as continuing after a failed attempt, when the advertisement provider confirms that the reward requirements have been met.
The advertising SDK may collect and share information including:
IP addresses, which may indicate approximate location.
Device, app and advertising identifiers.
App interactions and advertisement activity.
Diagnostic and technical information.
These data are used for advertising, measurement, analytics and fraud prevention.
Where required, Google's consent system asks for your choices before advertising-related processing begins. Advertisement availability and personalization depend on applicable requirements, your choices and Google's settings.
Declining personalized advertising does not necessarily stop all advertising-related data processing.
When applicable, you can review or change your advertising choices through Privacy options in the Game's settings. These advertising choices do not automatically control all analytics or crash-reporting processing.
See Google’s Privacy Policy and Google’s advertising information.
The Game uses Google Analytics for Firebase to understand how players use the Game and to improve gameplay.
Information processed may include:
App-instance and device identifiers.
Device model, operating system and app version.
Sessions, engagement and gameplay events.
Level starts, completions and failed attempts.
Knife unlocks and crystal collection events.
Advertisement interactions.
General geographic information and other automatically collected analytics information.
We use these data to understand progression, identify difficult levels, evaluate features and improve the player experience.
Where consent is required, the relevant collection is enabled only after the required consent has been obtained. Analytics information is processed according to our configured collection and retention settings and Google's applicable terms.
See Google’s Privacy Policy and Firebase privacy information.
The Game uses Firebase Crashlytics to investigate crashes, errors and stability problems.
Crash reports may contain installation identifiers, device and operating-system information, app version, error messages, stack traces and diagnostic logs related to the issue.
We use this information to identify technical problems and improve reliability. Crashlytics is separate from gameplay analytics.
Google's Firebase documentation states that Crashlytics retains crash reports and associated identifiers for 90 days before beginning their removal from live and backup systems.
See Firebase privacy information.
If you contact us, we receive the information you provide, such as your email address, message, screenshots or device details.
We use this information to respond to support and privacy requests. Please do not send passwords, payment-card details or unnecessary sensitive information.
Information is processed to:
Operate the Game and preserve progress.
Provide achievements and leaderboards.
Display advertisements and deliver earned rewards.
Understand gameplay and improve features.
Investigate crashes and technical problems.
Respond to support and privacy requests.
Meet applicable legal obligations.
Google processes information through AdMob, Play Games, Analytics and Crashlytics. Our email provider processes support correspondence.
We do not sell personal information for money. Advertising-related processing may nevertheless be classified as sharing or targeted advertising under some laws and is subject to the applicable privacy choices.
Information may also be disclosed when required by law or necessary to investigate abuse or protect users and applicable rights.
You can:
Review advertising choices through Privacy options in the Game's settings when applicable.
Read this policy through Privacy Policy in the Game's settings.
Manage Play Games connection, profile visibility and game data through Google.
Reset or delete your advertising ID using available Android settings.
Contact us about your information and privacy requests.
Depending on your location, you may have rights to access, correct or delete personal information, receive a copy, restrict or object to processing, or withdraw consent where processing relies on consent.
Withdrawing consent does not affect the lawfulness of processing carried out before withdrawal.
Contact us to exercise applicable rights. We may need information to identify the relevant records or game installation, but will not ask for your Google password. You may also complain to your local data protection authority.
Local game data remain on your device until removed or replaced. Clearing the Game's app storage through Android settings removes local progress and preferences. Device backups may affect whether information is later restored.
Deleting local data does not automatically delete records held by Google Play Games, Analytics, Crashlytics or advertising services.
Play Games records can be managed through Google's settings. Analytics retention follows the configured retention settings. Crashlytics retention is described above. Advertising information is retained according to Google's applicable policies.
We retain support correspondence as needed to handle requests and meet applicable legal obligations.
For access or deletion requests concerning information processed on our behalf, contact us. Some information held independently by a provider may require its separate request procedure. Deleting Game-related information does not delete your Google account.
The Game is intended for teenagers aged 13 and older and adults. It is not directed at children under 13.
Privacy protections and consent requirements for younger users vary by country. If you are a parent or guardian and believe your child has provided personal information in connection with the Game, contact us so we can investigate and take appropriate action.
We use reasonable safeguards appropriate to the information we handle. No storage or transmission method is completely secure.
Our service providers may process information in countries other than yours under the safeguards described in their applicable policies and terms.
We may update this policy when the Game or its data practices change.
The latest version will be available on this page and accessible through the Game's settings, with a revised update date. Additional notice will be provided where required.
Knife Reflex uses Google Analytics for Firebase to understand how players use the game and improve gameplay. This may include app interactions, level progression, selected virtual items, purchase-related events, app version, device information, and app-instance identifiers.
We use Firebase Crashlytics to identify and fix technical problems. Reports may include crash stack traces, diagnostic logs, device and operating system information, app version, and installation identifiers.
We do not intentionally include email addresses, payment card details, purchase receipts, or authentication tokens in our custom analytics events or diagnostic reports.
These services are provided by Google. More information is available in Google’s Privacy Policy and Firebase Privacy and Security.
Developer: FastDevStudio
Game: Knife Reflex: Throw & Hit
Privacy and support email: fastdevstudio@gmail.com