# Soulver 4 vs Numline

The clearest difference is price: Soulver 4 at Free against Numline's $0.99. Numline's advantage is in-app purchases (none vs 14) and update cadence (every 2 days vs monthly). On ads, device support and iOS requirement there is nothing between them.

Soulver 4 is free to download; Numline costs $0.99 up front. Soulver 4 sells 14 in-app purchases, starting at $26.00 per year. Numline asks for nothing beyond the download.

Soulver 4 ships an update monthly, Numline every 2 days. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Soulver 4 | Numline |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.9 (435 ratings)](https://appshunter.io/ios/app/soulver-4/id1508732804/reviews)** | — |
| Number of ratings | **435** | — |
| Positive reviews | 76.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | Paid | — |
| Size | 39 MB | 5 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Zac Cohan](https://appshunter.io/developer/1508732803) | [Zhiqi Pan](https://appshunter.io/developer/1893386703) |

## What reviewers say

### 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


### Numline

[App page](https://appshunter.io/ios/app/numline-calculator-notepad/id6797324592)

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

**In-app purchases:** none


## Frequently asked questions

### Is Soulver 4 free?

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

### Is Numline free?

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

### Do Soulver 4 or Numline have ads?

Neither Soulver 4 nor Numline shows ads.

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

Soulver 4 ships an update monthly, and Numline every 2 days. Most recently, Soulver 4 was updated on October 27, 2026 and Numline on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*