# Slab: Concrete Calculator — Rebar, cement & cost estimator

> Offline construction material and cost estimator for concrete and masonry projects. (iPhone/iPad app by Laure Shin.)

- Source: https://appshunter.io/ios/app/slab-concrete-calculator/id6785225633 (this page in markdown: same URL + `.md`)
- Developer: [Laure Shin](https://appshunter.io/developer/6785226025)
- Category: Utilities, Productivity
- Price: $2.99 with in-app purchases
- Rating: 5.00/5 from 3 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English, French (France), Korean
- Released: 2026-07-06
- Data updated: 2026-09-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/slab-concrete-calculator/id6785225633/reviews.md

## What is Slab?

Slab turns the numbers on your tape measure into exactly how much material to order — and what it costs — fully offline, right on the jobsite.

Pick what you're pouring, enter your dimensions in feet-and-inches (12' 6 1/2") or metric, set your waste %, and get a big, legible answer you can trust: cubic yards or cubic meters, bag counts for 40, 50, 60 and 80-lb bags, ready-mix trucks, rebar bar count and tonnage, block and mortar, gravel tons. Bag counts always round up to full bags, so you never come up short.

WHY CREWS PAY ONCE FOR SLAB

• A real dollar quote. Add your unit cost per bag, per yard, per ton or per foot of rebar and Slab gives you a line total and a project total — an estimate you can hand a client or text to the supplier.

• Saved projects. Keep a whole job in one place — slab + footing + gravel base + rebar — with running material and cost totals across every area.

• Every material a crew pours. Slab, footing, wall, columns (rectangular and round/Sonotube-style), stairs, rebar, CMU block + mortar, gravel and soil.

• Feet-inches the way you read a tape — and clean metric for the rest of the world.

• Results that never get cut off. Big tabular numbers that scale with your text size and never truncate.

• Share a clean quote. Export a tidy PDF or text summary through the share sheet — generated offline.

PAID ONCE. OWNED FOREVER.

No subscription, ever. No ads. No account, no sign-up. Your projects stay on your device — data not collected. Works fully offline, in airplane mode, in a basement with no signal.

EVERYTHING INCLUDED

One price up front, every feature included: every material, dollar cost quotes, saved projects, and PDF/text export. No in-app purchases.

Built for concrete, masonry and hardscape crews, owner-operators, foremen, and DIY-pros doing a pour.

## Key features

- 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

## Pricing and in-app purchases

Base price: $2.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Slab Pro | $4.99 | one-time |


## Chart rankings

- #190 in Top Paid · Utilities (US App Store)

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/slab-concrete-calculator/id6785225633/reviews.md

### 5/5 — Helpful App!

*2026-08-28*

Using this app, I was able to save a lot of my budget! 100% worth the money!

### 5/5 — Spot-on accuracy and pricing!

*2026-08-17*

Brilliant app. This really saved me from overspending. Super easy to use and does exactly what it promises.

### 5/5 — Paid only once to use functions unlike other apps

*2026-07-13*

Solid calculator with many functions. Supports all functions without subscription

## Frequently asked questions about Slab

### 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.

## Version history (last 5 releases)

### 1.4 — 2026-08-24

Slab is now a simple one-time purchase: every material, cost quotes, saved projects and export are all included — no in-app purchases. Plus stability improvements.

### 1.3 — 2026-08-15

• New app icon
• Fixes and refinements

### 1.2 — 2026-08-12

• New: Asphalt calculator — driveway tons from area × thickness (145 lb/ft³ hot-mix standard)
• New: Crushed stone #57 preset + compaction allowance for road base (+20%)
• Fixes and refinements

### 1.1 — 2026-07-18

Minor improvements.

### 1.0 — 2026-07-06

No release notes.

## More apps by Laure Shin

- [MiteWindow — Varroa Planner](https://appshunter.io/ios/app/mitewindow-varroa-planner/id6787297534)
- [PoolDose: Pool & Spa Dosing](https://appshunter.io/ios/app/pooldose-pool-and-spa-dosing/id6790205421)
- [Pipe Offset](https://appshunter.io/ios/app/pipe-offset/id6792919515)

All apps by Laure Shin: https://appshunter.io/developer/6785226025

## Related topics

[concrete calculator free](https://appshunter.io/ios/topics/concrete-calculator-free) · [slab](https://appshunter.io/ios/topics/slab) · [concrete slab calculator](https://appshunter.io/ios/topics/concrete-slab-calculator) · [concrete calculator](https://appshunter.io/ios/topics/concrete-calculator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-01.*