# Emerald Chronometer vs DayCalc Pro

The clearest difference is price: Emerald Chronometer at Free against DayCalc Pro's $0.99. Emerald Chronometer also leads on in-app purchases (none vs 9) and rating (4.9 vs 4.6). DayCalc Pro's advantage is update cadence (every 6 weeks vs every 22 months) and iOS requirement (13.0 vs 15.0). On ratings volume and device support there is nothing between them.

Emerald Chronometer is free to download; DayCalc Pro costs $0.99 up front. DayCalc Pro sells 9 one-off in-app purchases. Emerald Chronometer asks for nothing beyond the download.

Emerald Chronometer holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 105 and 176 respectively. Written reviews point the same way: 97% of Emerald Chronometer's written reviews are positive against 86% of DayCalc Pro's.

Emerald Chronometer ships an update every 22 months, DayCalc Pro every 6 weeks. The most recent releases landed on September 18, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Emerald Chronometer | DayCalc Pro |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.9 (105 ratings)](https://appshunter.io/ios/app/emerald-chronometer/id284953670/reviews)** | [4.6 (176 ratings)](https://appshunter.io/ios/app/daycalc-pro-note-calculator/id654444242/reviews) |
| Number of ratings | 105 | **176** |
| Positive reviews | **96.8% of reviews** | 85.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 22 months | **Every 6 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 311 MB | 99 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Scapa Flow, LLC](https://appshunter.io/developer/635350184) | [良峰 侯](https://appshunter.io/developer/654444245) |

## What reviewers say

### Emerald Chronometer

[App page](https://appshunter.io/ios/app/emerald-chronometer/id284953670)

Experience highly detailed mechanical watch faces with advanced astronomical and clock complications. Track celestial events, manage time with precision, and explore historical and future dates with interactive displays. Optimized for iPhone and iPod touch.

**Highlights:** Accurate astronomical data (4000 BCE - 2800 CE), Sun, Moon, and planet rise/set times, Mechanical display of Moon phases, Precise local and UTC time, Chronograph with split timer, World-time and calendar watches, Interactive time-travel simulation

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Emerald Chronometer free?

Emerald Chronometer is free to download, with no in-app purchases.

### Is DayCalc Pro free?

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

### Which has better reviews, Emerald Chronometer or DayCalc Pro?

Emerald Chronometer is rated higher. Emerald Chronometer averages 4.9 out of 5 from 105 ratings, while DayCalc Pro averages 4.6 from 176 ratings.

### Which is updated more often, Emerald Chronometer or DayCalc Pro?

Emerald Chronometer ships an update every 22 months, and DayCalc Pro every 6 weeks. Most recently, Emerald Chronometer was updated on September 18, 2026 and DayCalc Pro on September 24, 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.*