# Calculi vs MathRoomBuddy

The clearest difference is price: Calculi at Free against MathRoomBuddy's $0.99. Calculi also leads on update cadence (every 2 months vs every 22 months) and ratings volume (383 vs 2). MathRoomBuddy's advantage is rating (5.0 vs 4.4) and in-app purchases (none vs 4). On ads and device support there is nothing between them.

Calculi is free to download; MathRoomBuddy costs $0.99 up front. Calculi sells 4 in-app purchases, starting at $2.99 per year. MathRoomBuddy asks for nothing beyond the download.

MathRoomBuddy holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Calculi has 383 ratings behind it against 2, so its average is the more settled of the two.

Calculi ships an update every 2 months, MathRoomBuddy every 22 months. The most recent releases landed on October 22, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Calculi | MathRoomBuddy |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.4 (383 ratings)](https://appshunter.io/ios/app/calculi-scientific-calculator/id452182503/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/mathroombuddy/id1466211804/reviews)** |
| Number of ratings | **383** | 2 |
| Positive reviews | 35.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 22 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 43 MB | 8 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | **iPhone, iPad, Apple TV, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Natole, Jr.](https://appshunter.io/developer/443621043) | [Mike Green](https://appshunter.io/developer/1466211803) |

## What reviewers say

### Calculi

[App page](https://appshunter.io/ios/app/calculi-scientific-calculator/id452182503)

A smart and powerful calculator designed for ease of use, offering advanced scientific functions, unit and currency conversion, and a supercharged history tape. It adapts to various devices and supports external keyboards for enhanced functionality.

**Highlights:** Complex expression solving, Unit conversion (17 categories), Currency conversion (30+ currencies), Scientific constants, Supercharged history tape, iMessage app integration, Apple Watch app

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calculi Pro | $2.99 | per year |
| Small Tip | $0.99 | one-time |
| Medium Tip | $2.99 | one-time |
| Large Tip | $4.99 | one-time |

**What reviewers like**

- 👍 Better than stock iPhone calculator
- 📈 History screen with past answers/expressions
- 🔄 Regular helpful updates
- ⌨️ Works with keyboard
- 🗂️ Works in Split Screen

**What reviewers complain about**

- ⚠️ Pop-up rating requests
- 💸 Added ads in updates
- 🎛️ Clutter of unused keys on iPad
- 🐛 Buggy history feature
- 💥 Crashes during multiplication

**Reported bugs**

- Calculation not appearing in history until app restart
- New calculation replaces previous in history tile
- Crashes when multiplying by 1.03
- Physical iPad keyboard not recognized
- App crashes/closes on iPad iOS 13

**Requested features**

- Option for Dark Mode all the time
- Option to choose icons
- Fix Slide Over functionality


### MathRoomBuddy

[App page](https://appshunter.io/ios/app/mathroombuddy/id1466211804)

This utility app converts between IEEE floating-point and raw values, as well as hexadecimal and decimal formats. It also functions as a simple RPN calculator.

**Highlights:** IEEE floating-point conversion, Hexadecimal to decimal conversion, Decimal to hexadecimal conversion, RPN calculator functionality

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calculi free?

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

### Is MathRoomBuddy free?

MathRoomBuddy costs $0.99, with no in-app purchases.

### Which has better reviews, Calculi or MathRoomBuddy?

MathRoomBuddy is rated higher. Calculi averages 4.4 out of 5 from 383 ratings, while MathRoomBuddy averages 5.0 from 2 ratings.

### Do Calculi or MathRoomBuddy have ads?

Neither Calculi nor MathRoomBuddy shows ads.

### Which is updated more often, Calculi or MathRoomBuddy?

Calculi ships an update every 2 months, and MathRoomBuddy every 22 months. Most recently, Calculi was updated on October 22, 2026 and MathRoomBuddy on October 20, 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.*