# Birefringence vs Nite Time

The clearest difference is review sentiment: Birefringence at 89% against Nite Time's 0%. Birefringence also leads on rating (4.8 vs 2.5) and in-app purchases (none vs 1). Nite Time's advantage is price (Free vs $2.99). On ratings volume, ads and device support there is nothing between them.

Nite Time is free to download; Birefringence costs $2.99 up front. Nite Time sells 1 one-off in-app purchase. Birefringence asks for nothing beyond the download.

Birefringence holds the better App Store score, 4.8 against 2.5. Both are backed by a comparable volume of ratings — 9 and 4 respectively. Written reviews point the same way: 89% of Birefringence's written reviews are positive against 0% of Nite Time's.

## The numbers

| Metric | Birefringence | Nite Time |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.8 (9 ratings)](https://appshunter.io/ios/app/birefringence/id1354688131/reviews)** | [2.5 (4 ratings)](https://appshunter.io/ios/app/nite-time-2/id6746581094/reviews) |
| Number of ratings | **9** | 4 |
| Positive reviews | **88.9% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | — |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 14 MB | 5 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Barlow](https://appshunter.io/developer/1229786938) | [Nick Fanger](https://appshunter.io/developer/573922485) |

## What reviewers say

### Birefringence

[App page](https://appshunter.io/ios/app/birefringence/id1354688131)

This interactive tool helps identify minerals by calculating birefringence based on observed color and section thickness. It features a comprehensive database and offers two display modes for clarity.

**Highlights:** Interactive Michel-Lévy color chart, Database of 562 minerals, Automatic birefringence calculation, Adjustable chart range (200-2500 nm), Simple display mode, Includes optical and physical mineral characteristics

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

**In-app purchases:** none


### Nite Time

[App page](https://appshunter.io/ios/app/nite-time-2/id6746581094)

This app provides a large, full-screen digital clock designed for easy readability from a distance, even in low light. It offers customizable display options and ensures the screen remains on all night without distractions.

**Highlights:** Full-screen time display, Swipe to control brightness, 12h or 24h formats, Optional AM/PM, date, battery, flashlight, Custom fonts and colors, Screen stays on all night

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Customization Unlock | $0.99 | one-time |


## Frequently asked questions

### Is Birefringence free?

Birefringence costs $2.99, with no in-app purchases.

### Is Nite Time free?

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

### Which has better reviews, Birefringence or Nite Time?

Birefringence is rated higher. Birefringence averages 4.8 out of 5 from 9 ratings, while Nite Time averages 2.5 from 4 ratings.

### Do Birefringence or Nite Time have ads?

Neither Birefringence nor Nite Time shows ads.

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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.*