# DayCalc Pro vs Vatupassi

The clearest difference is price: Vatupassi at Free against DayCalc Pro's $0.99. Vatupassi also leads on update cadence (every 2 days vs every 6 weeks). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Vatupassi is free to download; DayCalc Pro costs $0.99 up front. DayCalc Pro sells 9 one-off in-app purchases and Vatupassi sells 1 in-app purchase, starting at $0.99 per year. Whichever you choose, the download price is not the number that matters.

DayCalc Pro ships an update every 6 weeks, Vatupassi every 2 days. The most recent releases landed on October 12, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | DayCalc Pro | Vatupassi |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.6 (177 ratings)](https://appshunter.io/ios/app/daycalc-pro-note-calculator/id654444242/reviews)** | — |
| Number of ratings | **177** | — |
| Positive reviews | 85.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 98 MB | 23 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [良峰 侯](https://appshunter.io/developer/654444245) | [Petri Tynkkynen](https://appshunter.io/developer/6796634385) |

## What reviewers say

### DayCalc Pro

[App page](https://appshunter.io/ios/app/daycalc-pro-note-calculator/id654444242)

This app combines a powerful calculator with a comprehensive unit converter. It offers standard and scientific calculations, allows notes to be added to history, and supports a wide range of units and custom conversions. Enjoy a user-friendly interface with customizable themes and watchOS integration.

**Highlights:** Standard and scientific calculator, Add notes to calculations, Over 600 units in 20 categories, Custom unit creation, Automatic currency exchange rate updates, Dark Mode support, Apple Watch integration

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Constants Pack | $0.99 | one-time |
| Festivals Theme Pack 1 | $0.99 | one-time |
| Season Theme Pack 1 | $0.99 | one-time |
| Bird Theme Pack 1 | $0.99 | one-time |
| Insects Theme Pack 1 | $0.99 | one-time |
| Season Theme Pack 2 | $0.99 | one-time |
| Festivals Theme Pack 2 | $0.99 | one-time |
| Custom Unit Pack | $1.99 | one-time |
| Complete Pack | $4.99 | one-time |

**What reviewers like**

- 👍 Easy to use and intuitive interface
- 🎨 Customizable themes and colors
- 📊 Comprehensive feature set (scientific, fractions, conversions)
- 💰 Great value for price (free or $1)
- 📝 Useful history/tape feature for tracking calculations

**What reviewers complain about**

- 🐛 Update installation issues and stuck downloads
- 🐛 Display cutoff in landscape mode on smaller phones
- 🐛 Fraction display cuts off large numbers
- 🐛 Currency converter fails after favoriting
- 🐛 Copy function only copies first number

**Reported bugs**

- Latest update stuck on download/installation loop
- Display rendering issues in landscape mode on iPhone 12/13 mini
- Fraction results display truncated with large numbers
- Fraction operator placement incorrect during multi-step calculations
- Currency conversion broken after favoriting currencies

**Requested features**

- Cursor movement for easier digit and symbol editing
- Back button to delete individual numbers instead of clearing all
- History display directly above input without clicking
- Back button in converter functions for easier navigation
- Improved animated transitions for better aesthetics


### Vatupassi

[App page](https://appshunter.io/ios/app/vatupassi-bubblelevel/id6797196817)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vatupassi Pro | $0.99 | per year |


## Frequently asked questions

### Is DayCalc Pro free?

DayCalc Pro costs $0.99, and also offers in-app purchases.

### Is Vatupassi free?

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

### Do DayCalc Pro or Vatupassi have ads?

Neither DayCalc Pro nor Vatupassi shows ads.

### Which is updated more often, DayCalc Pro or Vatupassi?

DayCalc Pro ships an update every 6 weeks, and Vatupassi every 2 days. Most recently, DayCalc Pro was updated on October 12, 2026 and Vatupassi on October 4, 2026.

---

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