# SMART vs Concrete Slab Calculator

The clearest difference is ads: Concrete Slab Calculator at none against SMART's shown. Concrete Slab Calculator also leads on rating (5.0 vs 4.7) and iOS requirement (13.0 vs 17.0). SMART's advantage is update cadence (fortnightly vs every 32 months) and monetization model (free with in-app purchases vs paid). On price, ratings volume, in-app purchases and device support there is nothing between them.

Both are free to download. SMART sells 10 in-app purchases, starting at $2.99 per month and Concrete Slab Calculator sells 3 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Concrete Slab Calculator holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 9 and 4 respectively.

SMART ships an update fortnightly, Concrete Slab Calculator every 32 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SMART | Concrete Slab Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (9 ratings)](https://appshunter.io/ios/app/smart-pdf-document-scanner/id1512794804/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/concrete-slab-calculator/id1555219094/reviews)** |
| Number of ratings | **9** | 4 |
| Positive reviews | 95.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 32 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 15 MB | 2 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bartnitzky, Böttcher und Springer GbR](https://appshunter.io/developer/1512794803) | [Anna Filobok](https://appshunter.io/developer/1613515832) |

## What reviewers say

### SMART

[App page](https://appshunter.io/ios/app/smart-pdf-document-scanner/id1512794804)

Organize your life by scanning documents, bills, and receipts. Automatically name files, set reminders for deadlines, and search text within your papers. Keep everything private and secure on your own devices.

**Highlights:** Automatic document scanning and edge detection, Smart naming suggestions based on content, Deadline detection and calendar reminders, Full-text search within scanned documents, PDF editing, signing, and annotation, Cross-device sync for iPhone, iPad, and Mac, Password-protected folders with Face ID/Touch ID

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SMART-PDF Premium – 1 month | $2.99 | per month |
| SMART-PDF Premium – 3 months | $6.99 | per 3 months |
| SMART-PDF Premium – 6 months | $11.99 | per 6 months |
| SMART-PDF Premium – 12 months | $22.99 | per year |
| 10 SMART-PDF Coins | $0.99 | one-time |
| 100 SMART-PDF Coins | $5.99 | one-time |
| 150 SMART-PDF Coins | $8.99 | one-time |
| 250 SMART-PDF Coins | $13.99 | one-time |
| 500 SMART-PDF Coins | $17.99 | one-time |
| 750 SMART-PDF Coins | $22.99 | one-time |


### Concrete Slab Calculator

[App page](https://appshunter.io/ios/app/concrete-slab-calculator/id1555219094)

This tool quickly calculates the area, volume, and weight of concrete slabs in real-time. It supports conversions between imperial and metric units for all key measurements, allowing for custom density input.

**Highlights:** Real-time calculations, Imperial and metric unit conversion, Custom density input, Instantaneous area, volume, and weight results, Supports multiple unit types for width, length, depth, weight, density, area, and volume

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $0.99 | per 7 days |
| Premium Access | $1.99 | per month |
| Premium Access | $5.99 | per year |


## Frequently asked questions

### Is SMART free?

SMART is free to download, with in-app purchases available.

### Is Concrete Slab Calculator free?

Concrete Slab Calculator is free to download, with in-app purchases available.

### Which has better reviews, SMART or Concrete Slab Calculator?

Concrete Slab Calculator is rated higher. SMART averages 4.7 out of 5 from 9 ratings, while Concrete Slab Calculator averages 5.0 from 4 ratings.

### Do SMART or Concrete Slab Calculator have ads?

SMART shows ads; Concrete Slab Calculator does not.

### Which is updated more often, SMART or Concrete Slab Calculator?

SMART ships an update fortnightly, and Concrete Slab Calculator every 32 months. Most recently, SMART was updated on October 29, 2026 and Concrete Slab Calculator on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*