# SDS Mobile vs Slope Calculation Tool

The clearest difference is rating: Slope Calculation Tool at 4.3 against SDS Mobile's 3.6. Slope Calculation Tool also leads on review sentiment (71% vs 53%) and monetization model (free vs ad-supported). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Slope Calculation Tool holds the better App Store score, 4.3 against 3.6. Both are backed by a comparable volume of ratings — 18 and 84 respectively. Written reviews point the same way: 53% of SDS Mobile's written reviews are positive against 71% of Slope Calculation Tool's.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on August 19, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | SDS Mobile | Slope Calculation Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (18 ratings)](https://appshunter.io/ios/app/sds-mobile/id467738315/reviews) | **[4.3 (84 ratings)](https://appshunter.io/ios/app/slope-calculation-tool/id1442177142/reviews)** |
| Number of ratings | 18 | **84** |
| Positive reviews | 53.1% of reviews | **71.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Ad-supported | **Free** |
| Size | 101 MB | 12 MB |
| Requires iOS | 15.5 | **12.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [KHA, Online-MSDS](https://appshunter.io/developer/467738319) | [Riyad Habash](https://appshunter.io/developer/1073719756) |

## What reviewers say

### SDS Mobile

[App page](https://appshunter.io/ios/app/sds-mobile/id467738315)

Access an extensive database of safety data sheets (SDS) and material safety data sheets (MSDS) on your mobile device. Quickly search for products using barcode scanning, view detailed chemical information, and respond effectively during emergencies. Share SDS documents via various communication channels.

**Highlights:** Access to industry-leading SDS/MSDS database, Barcode scanning for product search, Unlimited SDS viewing and searching, "My Favorites" binder for frequently used SDS, Share SDS via fax, email, text, and social media, GHS-compliant SDS

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Slope Calculation Tool

[App page](https://appshunter.io/ios/app/slope-calculation-tool/id1442177142)

Calculate all aspects of a ramp's dimensions, including slope, run, length, and rise. It can also measure the slope of existing surfaces using your device's sensors. Supports various input combinations for flexible calculations.

**Highlights:** Calculate slope, run, length, and rise, Supports multiple input combinations, Measure existing surface slopes, Uses device sensors for measurement, Calculates slope as percentage, ratio, and angle

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SDS Mobile free?

SDS Mobile is free to download, with no in-app purchases.

### Is Slope Calculation Tool free?

Slope Calculation Tool is free to download, with no in-app purchases.

### Which has better reviews, SDS Mobile or Slope Calculation Tool?

Slope Calculation Tool is rated higher. SDS Mobile averages 3.6 out of 5 from 18 ratings, while Slope Calculation Tool averages 4.3 from 84 ratings.

### Do SDS Mobile or Slope Calculation Tool have ads?

Neither SDS Mobile nor Slope Calculation Tool shows ads.

### Which is updated more often, SDS Mobile or Slope Calculation Tool?

SDS Mobile ships an update every 3 weeks, and Slope Calculation Tool every 3 weeks. Most recently, SDS Mobile was updated on August 19, 2026 and Slope Calculation Tool on September 25, 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.*