# Soulver 4 vs Bindery

The clearest difference is update cadence: Bindery at fortnightly against Soulver 4's monthly. Soulver 4's advantage is iOS requirement (17.6 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Soulver 4 sells 14 in-app purchases, starting at $26.00 per year and Bindery sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Soulver 4 ships an update monthly, Bindery fortnightly. The most recent releases landed on October 20, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Soulver 4 | Bindery |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (429 ratings)](https://appshunter.io/ios/app/soulver-4/id1508732804/reviews)** | — |
| Number of ratings | **429** | — |
| Positive reviews | 76.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Paid | — |
| Size | 39 MB | 76 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Zac Cohan](https://appshunter.io/developer/1508732803) | [Duy Anh Tuan Nguyen](https://appshunter.io/developer/6807186536) |

## 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


### Bindery

[App page](https://appshunter.io/ios/app/bindery/id6807418388)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bindery Pro | $3.99 | one-time |


## Frequently asked questions

### Is Soulver 4 free?

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

### Is Bindery free?

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

### Do Soulver 4 or Bindery have ads?

Neither Soulver 4 nor Bindery shows ads.

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

Soulver 4 ships an update monthly, and Bindery fortnightly. Most recently, Soulver 4 was updated on October 20, 2026 and Bindery on October 18, 2026.

---

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