# OSpectrometer vs Office Hours Reminder

The clearest difference is in-app purchases: Office Hours Reminder at none against OSpectrometer's 2. Office Hours Reminder also leads on update cadence (weekly vs every 2 weeks). OSpectrometer's advantage is iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

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

OSpectrometer ships an update every 2 weeks, Office Hours Reminder weekly. The most recent releases landed on October 15, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | OSpectrometer | Office Hours Reminder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (4 ratings)](https://appshunter.io/ios/app/ospectrometer/id6446124449/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 71 MB | 2 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [NANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI](https://appshunter.io/developer/1674573382) | [Enes Uysal](https://appshunter.io/developer/1708575767) |

## What reviewers say

### 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 |


### Office Hours Reminder

[App page](https://appshunter.io/ios/app/office-hours-reminder/id6759057151)

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

**In-app purchases:** none


## Frequently asked questions

### Is OSpectrometer free?

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

### Is Office Hours Reminder free?

Office Hours Reminder is free to download, with no in-app purchases.

### Do OSpectrometer or Office Hours Reminder have ads?

Neither OSpectrometer nor Office Hours Reminder shows ads.

### Which is updated more often, OSpectrometer or Office Hours Reminder?

OSpectrometer ships an update every 2 weeks, and Office Hours Reminder weekly. Most recently, OSpectrometer was updated on October 15, 2026 and Office Hours Reminder on October 17, 2026.

---

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