History

12 snapshots

Tracking since Apr 1, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 1, 2026	218	5.00	1	1.0.1
Apr 10, 2026	216	5.00	1	2.0.0
Apr 20, 2026	322	5.00	1	2.0.0
Apr 25, 2026	237	5.00	1	2.0.0
Apr 30, 2026	245	5.00	1	2.0.0
May 5, 2026	239	5.00	1	2.0.0
May 9, 2026	225	5.00	1	2.0.0
May 13, 2026	231	5.00	1	2.0.0
May 19, 2026	236	5.00	1	2.0.0
May 25, 2026	234	5.00	1	2.0.0
Jun 1, 2026	241	5.00	1	2.0.0
Jun 7, 2026	232	5.00	1	2.0.0
Now	242	5.00	1	2.0.0

Changelog

Apr 1, 2026

description

This extension is the product of my own curiosity when I started Granblue Fantasy casino and reading numerous GBF poker guides.

I decided to develop it after not being able to find any program or extension that could help me count cards and calculate the probability of getting a higher or lower card. Therefore this small extension keeps count of the cards that have been drawn during every turn progression and calculates a more accurate probability that improves on the tactic of just betting up for anything less than 8 or down for anything else higher.

Important notes:
- The extension interacts only with Chrome layer and therefore does not modify anything within the game, it only uses the information provided to mathematically calculate probabilities, yet USE IT AT YOUR OWN RISK as per the GBF ToS.
- To use the extension, you must open Developer Tools (Shorcut: F12) and click on the Panel list to open "GBF Poker Helper" panel. (See screenshots)
- The extension active within GBF game address but only works when playing Poker double up! otherwise it does not do anything.
- Please note this extension only shows the mathematical probabilities and therefore does not guarantee a successful bet.
- With few bets the probabilities differences might not be that significant, but as soon as the number of turn increases the information given by the extension can make a difference.

If you have any comments or suggestions please let me know.

Credits: The icons used are subset of images property of CyGames.

GBF Poker Helper

[MOTIVATION]
This extension was built out of personal curiosity while exploring the Granblue Fantasy casino and studying GBF poker strategy guides.

I couldn't find any tool that could both track drawn cards during Double Up and help evaluate which cards to hold during the main hand phase. The standard Double Up advice — bet Higher on anything below 8, bet Lower on anything above — completely ignores cards already removed from the deck. This extension tracks every card seen throughout a session and recalculates the true probabilities in real time, giving you a meaningful edge as the streak progresses. Version 2.0 goes further, adding a full hand evaluation assistant for the deal phase.

[HOW TO USE]
Open Chrome Developer Tools (F12), then select the GBF Poker Helper tab from the panel list. The extension activates automatically when you enter a GBF Poker session.

- Deal phase — The panel displays your 5 dealt cards and recommends which cards to hold, ranked by Expected Value across all 32 possible hold combinations.
- Double Up phase — After each round, the panel shows the real-time probability of drawing Higher, Lower, or Equal based on the cards still remaining in the deck.

[FEATURES]
- Hold recommendations ranked by Expected Value (EV) for all 32 hold combinations
- Supports all hand types: Royal Straight Flush, Five of a Kind, Straight Flush, Four of a Kind, Full House, Flush, Straight, Three of a Kind, Two Pair, One Pair
- Joker handled as a full wild card in both evaluation and EV calculation
- Real-time Higher / Draw / Lower probability display during Double Up
- Full 52-card deck tracking across an entire winning streak
- Automatic deck reset on loss, retire, or new deal
- Activity log showing each card drawn and deck state

[IMPORTANT NOTES]
- Probabilities and EV values are purely mathematical and do not guarantee any outcome.
- During Double Up, probability differences may be small early in a streak. The more cards that have been drawn, the more accurate and useful the information becomes.
- If you have any feedback, comments, or suggestions, feel free to reach out.

[DISCLAIMER]
This extension operates entirely within the Chrome browser layer. It does not modify, inject, or interact with the game in any way — it only reads network response data to perform mathematical calculations. That said, use it at your own risk, as it may fall under the GBF Terms of Service.

[CREDITS]
Icons are a subset of images property of Cygames.

[CHANGE LOG]

[2.0.0]
- New: Hold recommendation assistant for the 5-card deal phase
- Evaluates all 32 hold combinations and ranks them by Expected Value (EV)
- Full hand evaluator covering all 11 hand types with correct Joker wild card support
- EV calculation accounts for the full remaining deck (48 cards after deal)

[1.0.2]
- Fixed bugs, added error handling and improved code
- Added focus card display, cards remaining counter, and per-value deck tracker
- Face cards now shown as A/J/Q/K with numeric value in parentheses
- Deck now resets correctly on max-wins condition (poker_deal)

[1.0.1]
- Initial release
- Tracks drawn cards during the Double Up phase
- Calculates and displays Higher / Draw / Lower probabilities in real time

Apr 1, 2026

short_description

Counts cards in double-up-or-low and provides probabilities

Hand keep recommendations. Counts cards in double-up-or-low and provides probabilities.

Permissions & access

Permissions: activeTabdeclarativeContent
Host access: None declared

Screenshots

About

GBF Poker Helper

[MOTIVATION]
This extension was built out of personal curiosity while exploring the Granblue Fantasy casino and studying GBF poker strategy guides.

I couldn't find any tool that could both track drawn cards during Double Up and help evaluate which cards to hold during the main hand phase. The standard Double Up advice — bet Higher on anything below 8, bet Lower on anything above — completely ignores cards already removed from the deck. This extension tracks every card seen throughout a session and recalculates the true probabilities in real time, giving you a meaningful edge as the streak progresses. Version 2.0 goes further, adding a full hand evaluation assistant for the deal phase.

[HOW TO USE]
Open Chrome Developer Tools (F12), then select the GBF Poker Helper tab from the panel list. The extension activates automatically when you enter a GBF Poker session.

- Deal phase — The panel displays your 5 dealt cards and recommends which cards to hold, ranked by Expected Value across all 32 possible hold combinations.
- Double Up phase — After each round, the panel shows the real-time probability of drawing Higher, Lower, or Equal based on the cards still remaining in the deck.

[FEATURES]
- Hold recommendations ranked by Expected Value (EV) for all 32 hold combinations
- Supports all hand types: Royal Straight Flush, Five of a Kind, Straight Flush, Four of a Kind, Full House, Flush, Straight, Three of a Kind, Two Pair, One Pair
- Joker handled as a full wild card in both evaluation and EV calculation
- Real-time Higher / Draw / Lower probability display during Double Up
- Full 52-card deck tracking across an entire winning streak
- Automatic deck reset on loss, retire, or new deal
- Activity log showing each card drawn and deck state

[IMPORTANT NOTES]
- Probabilities and EV values are purely mathematical and do not guarantee any outcome.
- During Double Up, probability differences may be small early in a streak. The more cards that have been drawn, the more accurate and useful the information becomes.
- If you have any feedback, comments, or suggestions, feel free to reach out.

[DISCLAIMER]
This extension operates entirely within the Chrome browser layer. It does not modify, inject, or interact with the game in any way — it only reads network response data to perform mathematical calculations. That said, use it at your own risk, as it may fall under the GBF Terms of Service.

[CREDITS]
Icons are a subset of images property of Cygames.

[CHANGE LOG]

[2.0.0]
- New: Hold recommendation assistant for the 5-card deal phase
- Evaluates all 32 hold combinations and ranks them by Expected Value (EV)
- Full hand evaluator covering all 11 hand types with correct Joker wild card support
- EV calculation accounts for the full remaining deck (48 cards after deal)

[1.0.2]
- Fixed bugs, added error handling and improved code
- Added focus card display, cards remaining counter, and per-value deck tracker
- Face cards now shown as A/J/Q/K with numeric value in parentheses
- Deck now resets correctly on max-wins condition (poker_deal)

[1.0.1]
- Initial release
- Tracks drawn cards during the Double Up phase
- Calculates and displays Higher / Draw / Lower probabilities in real time