# LightSpectrum Pro vs Password 4 Pro

The clearest difference is price: Password 4 Pro at Free against LightSpectrum Pro's $1.99. Password 4 Pro also leads on update cadence (fortnightly vs every 3 months) and review sentiment (44% vs 28%). LightSpectrum Pro's advantage is rating (4.1 vs 2.5) and in-app purchases (none vs 3). On device support and iOS requirement there is nothing between them.

Password 4 Pro is free to download; LightSpectrum Pro costs $1.99 up front. Password 4 Pro sells 3 in-app purchases, starting at $0.99 per month. LightSpectrum Pro asks for nothing beyond the download.

LightSpectrum Pro holds the better App Store score, 4.1 against 2.5. That said, the two scores are not equally well evidenced: LightSpectrum Pro has 39 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 28% of LightSpectrum Pro's written reviews are positive against 44% of Password 4 Pro's, so the app with the better star average is not the one people write more warmly about.

LightSpectrum Pro ships an update every 3 months, Password 4 Pro fortnightly. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | LightSpectrum Pro | Password 4 Pro |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.1 (39 ratings)](https://appshunter.io/ios/app/lightspectrum-pro/id468368751/reviews)** | [2.5 (2 ratings)](https://appshunter.io/ios/app/password-4-pro/id570632076/reviews) |
| Number of ratings | **39** | 2 |
| Positive reviews | 28.5% of reviews | **44.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | **#77** | — |
| Size | 88 MB | 13 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AM PowerSoftware](https://appshunter.io/developer/303958914) | [Gerinn LLC](https://appshunter.io/developer/537042831) |

## What reviewers say

### LightSpectrum Pro

[App page](https://appshunter.io/ios/app/lightspectrum-pro/id468368751)

**Currently charting:** #77 Top Paid · Utilities (US App Store)

Measure light source color temperature and spectrum accurately without expensive equipment. View the color spectrum from 360nm to 800nm, and analyze the white point on the CIE 1931 diagram. Overlay filtered wavelengths on camera images to see frequency reflections and intensity.

**Highlights:** Color temperature measurement, Color spectrum analysis (360nm-800nm), CIE 1931 white point display, Wavelength filtering and overlay, High accuracy compared to professional devices

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 📸 Accurate white balance measurement for photography
- 💡 Innovative spectrum analysis without expensive equipment
- 💰 Affordable alternative to $1,600+ professional color meters
- 📊 Detailed spectral graph visualization
- 🎯 Useful for photographers, videographers, and lighting professionals

**What reviewers complain about**

- 🐛 Frequent crashes and freezing issues
- 📱 Incompatible with many iPhone models (iPhone 5, 5S, 6, 6+, 11, X)
- ❌ Camera access problems on multiple devices
- 🎨 Inaccurate readings for certain light types (LEDs, low color temps)
- 🖥️ Poor UI scaling on larger screens (iPhone 6+, iPad)

**Reported bugs**

- App crashes on startup or during use
- Camera feed not accessible or showing red X icon
- Screen blinking/flashing on first launch
- UI elements cut off on larger screens
- Buttons unresponsive or sticky

**Requested features**

- Spot metering with crosshairs or target reticle
- Direct DUV (Delta uv) display calculation
- Flicker detection for light sources
- Calibration function for improved accuracy
- Support for fluorescent light preset adjustments


### Password 4 Pro

[App page](https://appshunter.io/ios/app/password-4-pro/id570632076)

Securely manage all your passwords and sensitive information with military-level encryption. This app offers local backups, a secure notebook, and the ability to store images like credit cards. It features biometric unlock and an anti-screenshot function for enhanced privacy.

**Highlights:** Local data backup, Secure notebook, Save image information, Generate random passwords, Biometric unlock, Anti-screenshot

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Quarterly | $1.99 | per 3 months |
| Annual | $5.99 | per year |


## Frequently asked questions

### Is LightSpectrum Pro free?

LightSpectrum Pro costs $1.99, with no in-app purchases.

### Is Password 4 Pro free?

Password 4 Pro is free to download, with in-app purchases available.

### Which has better reviews, LightSpectrum Pro or Password 4 Pro?

LightSpectrum Pro is rated higher. LightSpectrum Pro averages 4.1 out of 5 from 39 ratings, while Password 4 Pro averages 2.5 from 2 ratings.

### Do LightSpectrum Pro or Password 4 Pro have ads?

Password 4 Pro shows ads; LightSpectrum Pro does not.

### Which is updated more often, LightSpectrum Pro or Password 4 Pro?

LightSpectrum Pro ships an update every 3 months, and Password 4 Pro fortnightly. Most recently, LightSpectrum Pro was updated on October 14, 2026 and Password 4 Pro on October 7, 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.*