Paid only once to use functions unlike other apps
Solid calculator with many functions. Supports all functions without subscription
Free
In-App Purchases
About
Calculate concrete, rebar, and other construction material needs and costs offline. Get precise measurements in feet-inches or metric, with options for bag counts, ready-mix, and tonnage. Generate professional quotes for clients or suppliers.
✓Material quantity estimation (concrete, rebar, block, gravel)
✓Cost calculation with unit pricing
✓Support for feet-inches and metric units
✓Offline functionality
✓Saved project management
✓PDF and text quote export
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What's New in Slab
1.1
July 18, 2026
Minor improvements.
1
In-App Purchases
$4.99
Slab Pro
Unlock all materials. Paid once, owned forever.
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FAQ
Does Slab have ads?
No, Slab is completely ad-free. The app emphasizes a distraction-free experience for users on the jobsite.
How much does Slab cost?
Slab is free to try with unlimited calculations for concrete and gravel. To unlock all features like other material types, cost quotes, and project saving, a one-time unlock purchase is required.
What is the age rating for Slab?
Slab has an age rating of 4+, making it suitable for a wide range of users. This indicates it contains no mature content.
How often is Slab updated?
Slab was last updated on July 18, 2026, indicating a recent focus on maintenance and potential improvements. The latest version is 1.1.
Can I use Slab offline?
Yes, Slab is designed to work fully offline, even in airplane mode or areas with no signal. This ensures you can calculate materials on any jobsite.
What devices does Slab support?
Currently, Slab is supported on iPhones. Future compatibility with other devices may be considered based on user demand.
What do users like about Slab?
Users appreciate Slab's ability to provide accurate material quantities and cost estimates offline, directly on the jobsite. The clear, legible results and professional quote generation are also highly valued.
Does Slab require an account?
No, Slab does not require an account or sign-up. Your projects are stored locally on your device, and your data is not collected.