# SigiCalc vs Konv

The clearest difference is review sentiment: Konv at 100% against SigiCalc's 50%. Konv also leads on update cadence (every 5 weeks vs every 48 months) and iOS requirement (14.0 vs 17.0). SigiCalc's advantage is in-app purchases (none vs 1). On price, ads and device support there is nothing between them.

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

SigiCalc ships an update every 48 months, Konv every 5 weeks. Both last shipped on October 13, 2026.

## The numbers

| Metric | SigiCalc | Konv |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sigicalc/id522503444/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 48 months | **Every 5 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 6 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Siegware](https://appshunter.io/developer/443908611) | [Tatiana Knysh](https://appshunter.io/developer/1431548565) |

## What reviewers say

### SigiCalc

[App page](https://appshunter.io/ios/app/sigicalc/id522503444)

This app provides a graphical RPN calculator with an undo feature. Users can input mathematical equations and instantly visualize them with a plot. It's designed for simplicity and practicality in mathematical calculations.

**Highlights:** Graphical RPN calculator, Equation plotting, Undo functionality, Simple interface, Practical calculations

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

**In-app purchases:** none


### Konv

[App page](https://appshunter.io/ios/app/konv/id1431548566)

This app offers fast and simple conversions for units and currencies across 13 essential categories. It includes quick presets for common conversions and currency exchange rates with online updates and offline capabilities.

**Highlights:** Unit and currency conversion, 13 essential categories, Quick presets, Online currency updates, Offline currency mode

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Your Unit Converter | $0.99 | one-time |


## Frequently asked questions

### Is SigiCalc free?

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

### Is Konv free?

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

### Do SigiCalc or Konv have ads?

Neither SigiCalc nor Konv shows ads.

### Which is updated more often, SigiCalc or Konv?

SigiCalc ships an update every 48 months, and Konv every 5 weeks. Most recently, SigiCalc was updated on October 13, 2026 and Konv on October 13, 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.*