# Calculator ⁺⁻ vs Humidity Calc

The clearest difference is update cadence: Humidity Calc at every 3 weeks against Calculator ⁺⁻'s every 15 months. Calculator ⁺⁻'s advantage is iOS requirement (15.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Calculator ⁺⁻ ships an update every 15 months, Humidity Calc every 3 weeks. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Calculator ⁺⁻ | Humidity Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (42 ratings)](https://appshunter.io/ios/app/calculator/id6443813573/reviews)** | — |
| Number of ratings | **42** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 15 months | **Every 3 weeks** |
| Monetization | Ad-supported | — |
| Size | 4 MB | 38 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Matrix Software Co.](https://appshunter.io/developer/1457004046) | [Hiroaki Oosawa](https://appshunter.io/developer/6797133579) |

## What reviewers say

### Calculator ⁺⁻

[App page](https://appshunter.io/ios/app/calculator/id6443813573)

This app offers both basic and scientific calculation functions for iPhone and iPad. Users can customize its appearance, view calculation history, and perform complex equations with high accuracy. It also provides real-time calculation display and adjustable touch feedback.

**Highlights:** Basic and scientific calculator modes, Over 30 scientific operations, Calculation history view, Real-time calculation display, Customizable color themes, Adjustable button touch sound/vibration, High accuracy calculations (75+ significant digits)

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

**In-app purchases:** none


### Humidity Calc

[App page](https://appshunter.io/ios/app/humidity-calc/id6797133577)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculator ⁺⁻ free?

Calculator ⁺⁻ is free to download, with no in-app purchases.

### Is Humidity Calc free?

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

### Do Calculator ⁺⁻ or Humidity Calc have ads?

Both Calculator ⁺⁻ and Humidity Calc show ads.

### Which is updated more often, Calculator ⁺⁻ or Humidity Calc?

Calculator ⁺⁻ ships an update every 15 months, and Humidity Calc every 3 weeks. Most recently, Calculator ⁺⁻ was updated on October 24, 2026 and Humidity Calc on October 9, 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.*