# Calzy vs Soulver 4

The clearest difference is price: Soulver 4 at Free against Calzy's $1.99. Soulver 4 also leads on iOS requirement (17.6 vs 26.0). Calzy's advantage is update cadence (every 2 days vs monthly) and chart position (#48 vs unranked). On rating, review sentiment, ads and in-app purchases there is nothing between them.

Soulver 4 is free to download; Calzy costs $1.99 up front. Calzy sells 3 one-off in-app purchases and Soulver 4 sells 14 in-app purchases, starting at $26.00 per year. Whichever you choose, the download price is not the number that matters.

Soulver 4 holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 1.9K and 435 respectively. Written reviews split almost evenly too, at 77% and 76% positive.

Calzy ships an update every 2 days, Soulver 4 monthly. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Calzy | Soulver 4 |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [4.7 (1.9K ratings)](https://appshunter.io/ios/app/calzy/id623690732/reviews) | **[4.9 (435 ratings)](https://appshunter.io/ios/app/soulver-4/id1508732804/reviews)** |
| Number of ratings | **1.9K** | 435 |
| Positive reviews | **76.6% of reviews** | 76.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Monthly |
| Monetization | Paid | Paid |
| Best chart rank | **#48** | — |
| Size | 66 MB | 39 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Raja Vijayaraman](https://appshunter.io/developer/562575890) | [Zac Cohan](https://appshunter.io/developer/1508732803) |

## What reviewers say

### Calzy

[App page](https://appshunter.io/ios/app/calzy/id623690732)

**Currently charting:** #48 Top Paid · Productivity (US App Store)

This app offers a modern and intuitive way to perform everyday calculations. It features a unique Memory Area for reusing values, bookmarking for saved calculations, and leverages the latest iOS technologies for a seamless experience. Designed with privacy in mind, it's suitable for students and professionals alike.

**Highlights:** Memory Area for reusing values, Calculation bookmarking with titles, Basic and advanced calculation modes, Privacy mode with Face ID, Live Activity and Haptic Touch support, Customizable keypad layout, Dark and Light modes

**Features:** macOS Compatibility, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $3.99 | one-time |
| Huge Tip | $9.99 | one-time |


### Soulver 4

[App page](https://appshunter.io/ios/app/soulver-4/id1508732804)

This app combines the functionality of a notepad with a powerful calculator. It allows users to perform complex calculations using natural language, supports unit conversions, date math, and live currency conversions. Organize your calculations in sheets with text comments and share them as PDFs.

**Highlights:** Natural language calculations, Unit and currency conversions, Date and time math, Live currency and stock prices, Customizable accessory keyboards, Spreadsheet-like line references, Variables and conditional statements

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

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AI Assistant, Stocks & Weather | $26.00 | per year |
| Complementary Upgrade | Free | one-time |
| 30-day free trial (for iPhone) | Free | one-time |
| 60-day free trial (for iPad) | Free | one-time |
| 60-day free trial (for Mac) | Free | one-time |
| Soulver 4 for iPhone (upgrade) | $7.49 | one-time |
| Soulver 3 for iPhone | $14.00 | one-time |
| Soulver 4 for iPhone | $15.00 | one-time |
| Soulver 3 for iPad | $20.00 | one-time |
| Soulver 4 (Upgrade from Soulver 3) | $29.00 | one-time |
| Soulver 4 (Promotion) | $39.00 | one-time |
| Soulver 3 for Mac | $39.00 | one-time |
| Soulver 4 | $54.00 | one-time |
| Soulver 4 | $59.00 | one-time |

**What reviewers like**

- 💻 Powerful calculation tool
- 📝 Seamless note-taking integration
- 🔢 Intuitive natural language input
- 🗂️ Organized folder and sheet management
- ⚙️ Extensive unit conversion capabilities

**What reviewers complain about**

- 💰 Expensive one-time purchase price
- 🔁 Separate purchases for Mac, iPad, and iPhone
- 🤖 AI integration requires additional subscription
- 🐛 Occasional crashes and bugs reported
- 📊 Limited spreadsheet-like functionality

**Reported bugs**

- Crashes when using certain emojis in sheet titles
- Issues with iCloud sync and data migration from older versions
- Inconsistent behavior when modifying variables and formulas

**Requested features**

- Improved iPad and iPhone UI/UX
- Enhanced data export and sharing options
- More advanced mathematical and scientific functions
- Ability to define custom units and unit conversions


## Frequently asked questions

### Is Calzy free?

Calzy costs $1.99, and also offers in-app purchases.

### Is Soulver 4 free?

Soulver 4 is free to download, with in-app purchases available.

### Which has better reviews, Calzy or Soulver 4?

Soulver 4 is rated higher. Calzy averages 4.7 out of 5 from 1.9K ratings, while Soulver 4 averages 4.9 from 435 ratings.

### Do Calzy or Soulver 4 have ads?

Neither Calzy nor Soulver 4 shows ads.

### Which is updated more often, Calzy or Soulver 4?

Calzy ships an update every 2 days, and Soulver 4 monthly. Most recently, Calzy was updated on October 26, 2026 and Soulver 4 on October 27, 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.*