# Night Light for iPad vs OSpectrometer

The clearest difference is review sentiment: Night Light for iPad at 54% against OSpectrometer's 0%. Night Light for iPad also leads on rating (3.8 vs 2.0) and in-app purchases (none vs 2). OSpectrometer's advantage is update cadence (every 2 weeks vs every 4 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. OSpectrometer sells 2 in-app purchases, starting at $2.99 per month. Night Light for iPad asks for nothing beyond the download.

Night Light for iPad holds the better App Store score, 3.8 against 2.0. That said, the two scores are not equally well evidenced: Night Light for iPad has 136 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 54% of Night Light for iPad's written reviews are positive against 0% of OSpectrometer's.

Night Light for iPad ships an update every 4 months, OSpectrometer every 2 weeks. The most recent releases landed on October 23, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Night Light for iPad | OSpectrometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (136 ratings)](https://appshunter.io/ios/app/night-light-for-ipad-free/id427444029/reviews)** | [2.0 (4 ratings)](https://appshunter.io/ios/app/ospectrometer/id6446124449/reviews) |
| Number of ratings | **136** | 4 |
| Positive reviews | **53.8% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 12 MB | 71 MB |
| Requires iOS | **4.2** | 15.1 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Victor Ren](https://appshunter.io/developer/368705934) | [NANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI](https://appshunter.io/developer/1674573382) |

## What reviewers say

### Night Light for iPad

[App page](https://appshunter.io/ios/app/night-light-for-ipad-free/id427444029)

This utility app provides a customizable light source, mimicking a night light. Users can choose from various designs and colors to illuminate their surroundings. The light is activated by tapping the screen.

**Highlights:** Tap-activated light, HD design, Classic clicking sound, Multiple color options, Customizable night light designs

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 💡 Useful as a night light
- 🌈 Variety of colors
- 👍 Easy to use
- 💰 Free to use
- 💡 Can be used as a light board

**What reviewers complain about**

- 😠 Too many ads
- 😠 Ads on white screen
- 😠 Ads can't be removed
- 😠 Ads are annoying
- 🤔 Confusing to use

**Reported bugs**

- Ads spoil the use
- Does not work
- Blank white screen
- No instructions
- Ads interfere

**Requested features**

- Option to pay to remove ads
- Update the app
- Add animations (fish, planets, stars)
- Add lullaby music (baby, gothic)
- Add a dimmer


### OSpectrometer

[App page](https://appshunter.io/ios/app/ospectrometer/id6446124449)

This app uses your device's camera and screen to perform basic optical spectroscopy. Analyze the visible light spectrum of objects, map light wavelengths to RGB values, and save or share your findings. It functions offline without external hardware.

**Highlights:** Visible light spectrum analysis, RGB color value mapping, Wavelength selection and scanning, Front camera reflection sensing, Save and share results, Offline functionality

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| month | $2.99 | per month |
| year | $9.99 | per year |


## Frequently asked questions

### Is Night Light for iPad free?

Night Light for iPad is free to download, with no in-app purchases.

### Is OSpectrometer free?

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

### Which has better reviews, Night Light for iPad or OSpectrometer?

Night Light for iPad is rated higher. Night Light for iPad averages 3.8 out of 5 from 136 ratings, while OSpectrometer averages 2.0 from 4 ratings.

### Do Night Light for iPad or OSpectrometer have ads?

Neither Night Light for iPad nor OSpectrometer shows ads.

### Which is updated more often, Night Light for iPad or OSpectrometer?

Night Light for iPad ships an update every 4 months, and OSpectrometer every 2 weeks. Most recently, Night Light for iPad was updated on October 23, 2026 and OSpectrometer on October 15, 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.*