Comparison

GraphCalcPro2Go vs Callnor

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

GraphCalcPro2Go

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
Read full description

GraphCalcPro2Go is an advanced scientific calculator, offering features found on expensive handheld calculators, but with additional capabilities not possible with handhelds, thanks to iOS. Features include: • No ads. Ever. • Ultra high precision and range • Intuitive and easy to use • Standard (in-fix) and RPN modes • Built-in constants and unit conversions • iCloud sync With iCloud sync, you can synchronize your calculation history with GraphCalcPro2Go on all your iOS devices, and with GraphCalcPro on your Macs. Sharing feature allows you to share your calculation history with other users running GraphCalcPro2Go on their iOS devices and GraphCalcPro on their Macs. Additionally, you can create beautiful graphs with GCP2Go at the touch of a button. And now, you can run GCP2Go on your Apple Watch. GCP2Go on Apple Watch has the precision, performance, and all the scientific functions available on the iOS version - and graphing capability! Sync constants, and optionally history, between GCP2Go on your iPhone and your Apple Watch. Premium upgrade adds additional features, including: • Graph multiple equations simultaneously • Graph printing and sharing • Additional built-in constants, fully customizable • iCloud sync and sharing of user constants

About

Callnor

Read full description

Callnor is Linknor’s calling feature—now available as a standalone app. Previously, calling was built directly into Linknor. Callnor replaces this functionality with a dedicated app designed specifically for fast, seamless phone calls. The result: faster launch times, more direct operation, and an interface focused entirely on calling—without having to navigate through Linknor. DIRECTLY CONNECTED TO LINKNOR Callnor uses your contacts live from Linknor. Changes to names or favorites are available immediately, with no manual synchronization required. PRIVACY BY DESIGN Callnor intentionally stores only the minimum amount of data. Phone numbers remain exclusively in your iPhone’s Contacts app. Names and favorites are retrieved directly from Linknor. A Linknor contact in Callnor is simply a reference to the corresponding entry in your address book. Contact information is neither duplicated nor permanently stored in Callnor. This keeps the app lightweight while ensuring your contact data stays exactly where you expect it. WHAT IS SENT TO LINKNOR After every call, Callnor sends the following information to Linknor: • Which contact was called • When the call started and ended • How long the call lasted • Whether the call was successfully connected Opening a contact is also recorded as a separate event. Phone numbers are used only briefly to match the call to a contact and are not permanently stored by Linknor. WHAT LINKNOR DOES WITH THIS INFORMATION Linknor automatically adds every event to the contact history of the corresponding profile. Calls appear in the communication history with their status and duration—just like calls logged directly in Linknor. The “Last Contacted” date is also updated automatically. This keeps your complete communication history in one place, even when calls are made through Callnor. FEATURES • Clear dashboard showing today’s calls, connection rate, and weekly activity • Alphabetically sorted and searchable contact list with quick navigation and favorites • Classic dial pad for numbers not stored in your contacts • Call history showing the status and duration of every call WHY A SEPARATE APP? A calling app needs to respond instantly when a call starts or ends. As a standalone app, Callnor is optimized specifically for this purpose—without having to load the rest of Linknor’s functionality at the same time.

Screenshots

GraphCalcPro2Go4 screens
Callnor3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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

Scorecard3 real differences · 7 level
GraphCalcPro2Go versus Callnor: the parameters behind the verdict, then further details
ParameterGraphCalcPro2GoCallnor
PriceFreeFree
Rating4.6 (40 ratings) — better—
Positive reviews80.0% of reviews—
Number of ratings40 — better—
Update frequencyEvery 3 monthsDaily — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS18.617.0 — better
Further details — not scored
Size9 MB3 MB
Age rating4+4+
DeveloperStarware Software LLCMichael Schoenbeck

In-app purchases

1 purchases

GraphCalcPro2Go

One-time1
  • Premium$0.99
None

Callnor

No in-app purchases

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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