# Calculator vs Summa

The clearest difference is review sentiment: Summa at 100% against Calculator's 33%. Summa also leads on rating (5.0 vs 4.3) and in-app purchases (none vs 1). Calculator's advantage is ratings volume (20 vs 1) and iOS requirement (15.0 vs 17.0). On price and device support there is nothing between them.

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

Summa holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Calculator has 20 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 33% of Calculator's written reviews are positive against 100% of Summa's.

Calculator ships an update every 3 months, Summa every 5 weeks. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Calculator | Summa |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (20 ratings)](https://appshunter.io/ios/app/calculator-15-calculators/id1609183107/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/summa-precision-made-simple/id6757430332/reviews)** |
| Number of ratings | **20** | 1 |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 33 MB | 24 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RV AppStudios LLC](https://appshunter.io/developer/340181308) | [Ville Scholin](https://appshunter.io/developer/1832654283) |

## What reviewers say

### Calculator

[App page](https://appshunter.io/ios/app/calculator-15-calculators/id1609183107)

This app offers a comprehensive suite of 15 calculators for everyday and scientific needs. Perform basic arithmetic, complex scientific calculations, and specialized conversions for units, taxes, loans, health, and more with accurate results.

**Highlights:** Classic and Scientific Calculations, Unit Converter (length, area, volume, etc.), Sales Tax, Tip, and Discount Calculators, Loan and Savings Calculators, Health (BMI, BMR) and Ovulation Calculators, GPA and Unit Price Calculators, Fuel Cost and Efficiency Calculators

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


### 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


## Frequently asked questions

### Is Calculator free?

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

### Is Summa free?

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

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

Summa is rated higher. Calculator averages 4.3 out of 5 from 20 ratings, while Summa averages 5.0 from 1 ratings.

### Do Calculator or Summa have ads?

Calculator shows ads; Summa does not.

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

Calculator ships an update every 3 months, and Summa every 5 weeks. Most recently, Calculator was updated on November 7, 2026 and Summa on November 5, 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.*