# GraphCalcPro2Go vs Callnor

The clearest difference is in-app purchases: Callnor at none against GraphCalcPro2Go's 1. Callnor also leads on update cadence (daily vs every 3 months). GraphCalcPro2Go's advantage is device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

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

GraphCalcPro2Go ships an update every 3 months, Callnor daily. The most recent releases landed on September 29, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | GraphCalcPro2Go | Callnor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (40 ratings)](https://appshunter.io/ios/app/graphcalcpro2go/id1091870099/reviews)** | — |
| Number of ratings | **40** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 3 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Starware Software LLC](https://appshunter.io/developer/988250389) | [Michael Schoenbeck](https://appshunter.io/developer/1887127479) |

## 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 |


### Callnor

[App page](https://appshunter.io/ios/app/callnor/id6793676356)

**In-app purchases:** none


## Frequently asked questions

### Is GraphCalcPro2Go free?

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

### Is Callnor free?

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

### Do GraphCalcPro2Go or Callnor have ads?

Neither GraphCalcPro2Go nor Callnor shows ads.

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

GraphCalcPro2Go ships an update every 3 months, and Callnor daily. Most recently, GraphCalcPro2Go was updated on September 29, 2026 and Callnor on October 7, 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.*