
Strobekit
Flash Guide Number Calculator
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Free
In-App Purchases
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About
Strobekit turns your flash's guide number into settings you can shoot with.
Pick what you want to know (aperture, flash distance, or your flash's real guide number), set ISO and power, and read the answer off an amber LCD built for quick glances on set. A distance chart shows every aperture and power level at once, and a "Why this works" line explains each result in plain language.
NEW TO FLASH?
Flash Basics walks you through guide numbers, stops, distance, manual vs TTL, shutter speed, bounce and fill flash in eight short lessons. Quick setups like "Close portrait" and "Group photo" give you a working starting point in one tap.
STROBEKIT PRO
One purchase unlocks every Pro tool, including new ones added in future updates:
• Flash Profiles: save your flashes with their real guide number at every zoom setting
• Bounce & Diffuser: correct exposure for ceiling bounce, umbrellas and softboxes
• Fill Flash: balance flash with daylight using the sunny-16 rule, with high-speed sync warnings
No accounts, no ads, no tracking. Your settings stay on your device.
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What's New in Strobekit
1.0
November 7, 2026
4
Subscriptions & In-App Purchases
$6.99
Strobekit Pro
Unlock every Pro tool, including future ones.




