# GraphCalcPro2Go vs tapSOS

The clearest difference is update cadence: tapSOS at every 6 days against GraphCalcPro2Go's every 3 months. tapSOS also leads on rating (5.0 vs 4.6). GraphCalcPro2Go's advantage is ratings volume (42 vs 1) and device support (3 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. GraphCalcPro2Go sells 1 one-off in-app purchase and tapSOS sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

tapSOS holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: GraphCalcPro2Go has 42 ratings behind it against 1, so its average is the more settled of the two.

GraphCalcPro2Go ships an update every 3 months, tapSOS every 6 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | GraphCalcPro2Go | tapSOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (42 ratings)](https://appshunter.io/ios/app/graphcalcpro2go/id1091870099/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tapsos-emergency-alert-app/id6746366393/reviews)** |
| Number of ratings | **42** | 1 |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 9 MB | 3 MB |
| Requires iOS | 18.6 | **18.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Starware Software LLC](https://appshunter.io/developer/988250389) | [Steve Noble](https://appshunter.io/developer/1807661302) |

## 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 |


### tapSOS

[App page](https://appshunter.io/ios/app/tapsos-emergency-alert-app/id6746366393)

This app provides instant emergency alerts by notifying your contacts with your live location and activating a loud alarm with flashing lights. It prioritizes user privacy, only sharing data during emergencies, and offers easy setup for multiple contacts and custom safety settings.

**Highlights:** One-tap SOS alerts, Real-time location sharing, Loud alarm and strobe light, Privacy-focused data sharing, Easy contact setup, Customizable safety settings

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Location Sharing Monthly | $2.99 | per month |


## Frequently asked questions

### Is GraphCalcPro2Go free?

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

### Is tapSOS free?

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

### Which has better reviews, GraphCalcPro2Go or tapSOS?

tapSOS is rated higher. GraphCalcPro2Go averages 4.6 out of 5 from 42 ratings, while tapSOS averages 5.0 from 1 ratings.

### Do GraphCalcPro2Go or tapSOS have ads?

Neither GraphCalcPro2Go nor tapSOS shows ads.

### Which is updated more often, GraphCalcPro2Go or tapSOS?

GraphCalcPro2Go ships an update every 3 months, and tapSOS every 6 days. Most recently, GraphCalcPro2Go was updated on October 24, 2026 and tapSOS on October 24, 2026.

---

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