# Summa vs FlexCalc

The clearest difference is in-app purchases: Summa at none against FlexCalc's 1. FlexCalc's advantage is iOS requirement (13.0 vs 17.0). On price, rating, ratings volume and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Summa against 5.0 for FlexCalc. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Summa ships an update every 5 weeks, FlexCalc every 3 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | Summa | FlexCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/summa-precision-made-simple/id6757430332/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/flexcalc-flexible-calculator/id6785043241/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 24 MB | 21 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ville Scholin](https://appshunter.io/developer/1832654283) | [Tho Tran](https://appshunter.io/developer/1110817755) |

## What reviewers say

### Summa

[App page](https://appshunter.io/ios/app/summa-precision-made-simple/id6757430332)

A clean, fast, and beautifully designed calculator for everyday math, scientific calculations, and quick conversions. Features live preview, history, favorites, and smart gestures for effortless and accurate calculations.

**Highlights:** Live preview of results, History and Favorites for calculations, Scientific functions (exponents, roots, trig), Built-in unit and currency converter, Smart gestures for interaction, Multiple themes and icon options

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

**In-app purchases:** none


### FlexCalc

[App page](https://appshunter.io/ios/app/flexcalc-flexible-calculator/id6785043241)

This utility app allows users to create and edit calculations with linked values that update instantly. It offers a history feature to review past work and supports sharing calculations. Users can also customize themes and fonts for a personalized experience.

**Highlights:** Editable calculations, Linked values update automatically, Reuse results in new calculations, Calculation history, Share calculations, Customizable themes and fonts, Scientific functions

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy a Coffee | $1.99 | one-time |


## Frequently asked questions

### Is Summa free?

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

### Is FlexCalc free?

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

### Which has better reviews, Summa or FlexCalc?

Summa and FlexCalc are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Summa or FlexCalc have ads?

Neither Summa nor FlexCalc shows ads.

### Which is updated more often, Summa or FlexCalc?

Summa ships an update every 5 weeks, and FlexCalc every 3 weeks. Most recently, Summa was updated on October 25, 2026 and FlexCalc on October 25, 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.*