CheckFirm

3.9
1.02K reviews
100K+
Downloads
Content rating
Everyone
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About this app

You can check Samsung device firmare with CheckFirm.

1. Search
Just input model and CSC. CheckFirm will search official and test firmware for you.

2. Bookmark
Add your device to bookmark. You can search it on main screen and search screen with one touch. You can also backup and restore your bookmarks!

3. Theme
You can choose light and dark theme. Latest One UI theme is embedded too.

4. Help
Are you a newbie to CheckFirm? I prepared information for you. You can see it on CheckFirm settings - Help.

5. Welcome Search
Whenever you open CheckFirm, it will search firmware automatically. You can enroll up to 4 devices.

6. Info Catcher
You can even get notification whenever new test firmware is found.

7. Sherlock & Watson
Samsung encrypted firmware. Now it's time to guess the real firmware. You can use Sherlock to decrypt firmware information! Use Sherlock, and be Watson.

8. Inquiry
Did you find a bug? Are you curious about the app? Do you have an amazing idea? You can contact with CheckFirm developer. My eyes and ears are always open for you guys.
Updated on
Oct 6, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Personal info
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

4.0
977 reviews
Rove McClain
January 11, 2026
The NULL errors persist after the latest update. Could you support dynamic colors for Material You Expressive? Would love the app to have some color. Dark is great and preferred over light, but it gets boring.
2 people found this review helpful
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Stephen Nohas
December 14, 2025
It's good that it lets you know when new firmware is being tested, but it doesn't let you know when it's going to be released. lt now only seems to show new OS updates which are testing, not security updates.
1 person found this review helpful
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A Google user
March 22, 2020
Amazing and useful app! I really find this app useful, especially for it telling me when i will receive the next update. But just a question. How can i exactly know when they will release the update. Often the builds of my devive (A505FN) have number 2 at the end, so it means they've rebuilt the firmware 2 times with a new OS but like 3 times in a row. But the last discovered edit on the firmware is 2020/03/17, so since then no firmware change. Is there an exact way to know when?
20 people found this review helpful
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Bluesion
March 23, 2020
Hi, First of all, thank you so much for your kind words. Unfortunately, there is no way to know the release date. It depends, but it usually takes about 3 weeks - 5 weeks. (OS upgrade takes longer) Thank you so much for using my app. If you have more questions, please email to me :)

What’s new

[11.2.1]
- Fixed Welcome Search.
- Tried to fix Info Catcher (still needs some tests).

[11.2.0]
- Fixed the error when latest official firmware is not the latest one.
- Improved the app version check logic.
- Improved the search logic.