# GraphCalcPro2Go vs SD Tool

The clearest difference is rating: GraphCalcPro2Go at 4.6 against SD Tool's 1.0. GraphCalcPro2Go also leads on ratings volume (40 vs 1). SD Tool's advantage is in-app purchases (none vs 1) and update cadence (every 6 weeks vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. GraphCalcPro2Go sells 1 one-off in-app purchase. SD Tool asks for nothing beyond the download.

GraphCalcPro2Go holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: GraphCalcPro2Go has 40 ratings behind it against 1, so its average is the more settled of the two.

GraphCalcPro2Go ships an update every 3 months, SD Tool every 6 weeks. The most recent releases landed on September 29, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | GraphCalcPro2Go | SD Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (40 ratings)](https://appshunter.io/ios/app/graphcalcpro2go/id1091870099/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/sd-tool/id1315420062/reviews) |
| Number of ratings | **40** | 1 |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 9 MB | 3 MB |
| Requires iOS | 18.6 | **13.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Starware Software LLC](https://appshunter.io/developer/988250389) | [Ubigreen](https://appshunter.io/developer/1315420061) |

## What reviewers say

### GraphCalcPro2Go

[App page](https://appshunter.io/ios/app/graphcalcpro2go/id1091870099)

This advanced scientific calculator offers ultra-high precision and a wide range of functions, replicating expensive handheld devices with added iOS capabilities. It supports both standard and RPN modes, includes built-in constants, and syncs across devices via iCloud. Users can also create graphs and share calculations.

**Highlights:** Ultra high precision and range, Standard (in-fix) and RPN modes, Built-in constants and unit conversions, iCloud sync across devices, Create and share graphs, Apple Watch compatibility

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $0.99 | one-time |


### SD Tool

[App page](https://appshunter.io/ios/app/sd-tool/id1315420062)

This utility app facilitates the management of Ubigreen SmartDesk sensors. Users can install, replace, disable, or move sensors by associating them with locations, scanning QR codes, or inputting serial numbers. It offers automatic data syncing to the cloud and local duplication detection.

**Highlights:** Install, replace, disable, and move sensors, Associate sensors with locations, Scan QR codes or input serial numbers, Automatic data sync to Ubigreen cloud, Export installed sensor list to CSV, Local duplication detection, View sensor status and autonomy

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GraphCalcPro2Go free?

GraphCalcPro2Go is free to download, with in-app purchases available.

### Is SD Tool free?

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

### Which has better reviews, GraphCalcPro2Go or SD Tool?

GraphCalcPro2Go is rated higher. GraphCalcPro2Go averages 4.6 out of 5 from 40 ratings, while SD Tool averages 1.0 from 1 ratings.

### Do GraphCalcPro2Go or SD Tool have ads?

Neither GraphCalcPro2Go nor SD Tool shows ads.

### Which is updated more often, GraphCalcPro2Go or SD Tool?

GraphCalcPro2Go ships an update every 3 months, and SD Tool every 6 weeks. Most recently, GraphCalcPro2Go was updated on September 29, 2026 and SD Tool on October 4, 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.*