# Lumy vs Dedup

The clearest difference is in-app purchases: Dedup at none against Lumy's 3. Dedup also leads on iOS requirement (15.1 vs 18.0). Lumy's advantage is chart position (#14 vs unranked) and update cadence (every 3 days vs weekly). On ads and device support there is nothing between them.

Lumy costs $7.99 and Dedup $9.99 up front. Lumy sells 3 one-off in-app purchases. Dedup asks for nothing beyond the download.

Lumy ships an update every 3 days, Dedup weekly. The most recent releases landed on October 23, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Lumy | Dedup |
| --- | --- | --- |
| Price | **$7.99** | $9.99 |
| Rating | **[4.8 (2.4K ratings)](https://appshunter.io/ios/app/lumy/id908905093/reviews)** | — |
| Number of ratings | **2.4K** | — |
| Positive reviews | 79.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Weekly |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#14** | — |
| Size | 259 MB | 43 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | **iPhone, iPad, Apple TV, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Raja Vijayaraman](https://appshunter.io/developer/562575890) | [Tianle Chen](https://appshunter.io/developer/1749428896) |

## What reviewers say

### Lumy

[App page](https://appshunter.io/ios/app/lumy/id908905093)

**Currently charting:** #14 Top Paid · Photo & Video, #102 Top Paid (US App Store)

Track sunrise, sunset, and golden hour for optimal outdoor activities and photography. This app offers personalized profiles, weather forecasts, and on-device data processing for privacy. Plan your day with natural light in mind.

**Highlights:** Personalized activity profiles (Modes), Sunrise, sunset, and golden hour tracking, Moon phase and rise/set times, 7-day weather forecasts, On-device data processing, Apple Watch complications and Live Activities, Customizable notifications

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A Little Light (Small Tip) | $0.99 | one-time |
| More Light (Medium Tip) | $3.99 | one-time |
| All the Light (Huge Tip) | $9.99 | one-time |

**What reviewers like**

- 💎 Beautifully designed
- 🚀 Intuitive and easy to use
- 🎨 Elegant and visually appealing
- ⏱️ Provides valuable time-sensitive information
- 📱 Seamless integration with Apple Watch

**What reviewers complain about**

- 🐛 Occasional crashes and bugs
- 🌍 Limited location support
- 🕰️ Inaccurate or outdated information in some cases
- 🔌 Battery drain issues on Apple Watch
- 🧭 Compass/direction information not always reliable

**Reported bugs**

- Widgets not working or displaying incorrect information
- Complications not updating properly on Apple Watch
- Crashes and freezes on certain iOS versions
- Location services not functioning as expected

**Requested features**

- More customization options for widgets and complications
- Ability to manually set location
- Integration with other weather/astronomy apps
- Expanded information on moon phases and celestial events
- Improved Apple Watch complications and support


### Dedup

[App page](https://appshunter.io/ios/app/dedup/id6503489725)

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

**In-app purchases:** none


## Frequently asked questions

### Is Lumy free?

Lumy costs $7.99, and also offers in-app purchases.

### Is Dedup free?

Dedup costs $9.99, with no in-app purchases.

### Do Lumy or Dedup have ads?

Neither Lumy nor Dedup shows ads.

### Which is updated more often, Lumy or Dedup?

Lumy ships an update every 3 days, and Dedup weekly. Most recently, Lumy was updated on October 23, 2026 and Dedup 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.*