# Massive Dev Chart Timer vs Lumu Light Meter

The clearest difference is price: Lumu Light Meter at Free against Massive Dev Chart Timer's $9.99. Lumu Light Meter also leads on update cadence (monthly vs every 5 months). Massive Dev Chart Timer's advantage is in-app purchases (none vs 3) and rating (3.7 vs 3.4). On ratings volume, ads, device support and iOS requirement there is nothing between them.

Lumu Light Meter is free to download; Massive Dev Chart Timer costs $9.99 up front. Lumu Light Meter sells 3 one-off in-app purchases. Massive Dev Chart Timer asks for nothing beyond the download.

Massive Dev Chart Timer holds the better App Store score, 3.7 against 3.4. Both are backed by a comparable volume of ratings — 54 and 99 respectively. Written reviews point the same way: 71% of Massive Dev Chart Timer's written reviews are positive against 53% of Lumu Light Meter's.

Massive Dev Chart Timer ships an update every 5 months, Lumu Light Meter monthly. The most recent releases landed on September 23, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Massive Dev Chart Timer | Lumu Light Meter |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[3.7 (54 ratings)](https://appshunter.io/ios/app/massive-dev-chart-timer/id402405770/reviews)** | [3.4 (99 ratings)](https://appshunter.io/ios/app/lumu-light-meter/id730969737/reviews) |
| Number of ratings | 54 | **99** |
| Positive reviews | **70.8% of reviews** | 52.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#22** | — |
| Size | 14 MB | 52 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Freestyle Photo & Imaging](https://appshunter.io/developer/1786429988) | [Lumu d.o.o.](https://appshunter.io/developer/912288615) |

## What reviewers say

### Massive Dev Chart Timer

[App page](https://appshunter.io/ios/app/massive-dev-chart-timer/id402405770)

**Currently charting:** #22 Top Paid · Photo & Video (US App Store)

This app provides an offline film development chart and a multi-step timer for photographers. It includes customizable agitation, darkroom themes, and support for various developing and fixing steps. It also offers automated compensation for development time and temperature.

**Highlights:** Offline film development chart, Multi-step timer with sound notifications, Customizable agitation schemes, Darkroom themes, Dilution mixer, Automated time/temperature compensation

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

**In-app purchases:** none

**What reviewers like**

- 📚 Comprehensive film and developer database
- ⏱️ Reliable timer with agitation reminders
- 🎯 Easy-to-use interface for darkroom work
- 🌙 Darkroom mode with red/black display
- ✏️ Customizable development times and profiles

**What reviewers complain about**

- 🚫 Black and white film only (no color film support)
- 🐛 Recent update broke HC110 dilution display
- 🐛 App crashes on certain devices/iOS versions
- 💰 Price point ($8.99-$11.99) for limited functionality
- 🔍 Poor search functionality for films

**Reported bugs**

- HC110 dilution section displays only letters, not ratios
- Dilution ratios not calculating when solution amount adjusted
- App crashes after selecting film speed
- Crashes on iPad with new update
- Timer display shows three dots instead of seconds

**Requested features**

- Color film support (C-41, E-6, ECN-2 processes)
- Search functionality by film brand/name
- Ability to add custom process steps (presoak, toning)
- Individual agitation control per development stage
- Continuous agitation option


### Lumu Light Meter

[App page](https://appshunter.io/ios/app/lumu-light-meter/id730969737)

This app functions as a standalone reflective light meter or pairs with hardware for professional flash and color temperature measurements. It offers various modes for photography and videography, storing measurements with notes and location.

**Highlights:** Standalone reflective light meter, Flash and color temperature metering, Photo and cine/video modes, Spot metering, Color temperature in Kelvin, Store measurements with notes

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lite to Power Upgrade | $69.99 | one-time |
| Power to Pro Upgrade | $229.99 | one-time |
| Lite to Pro Upgrade | $249.99 | one-time |

**What reviewers like**

- ✨ Accurate light metering
- ✨ Precise color meter readings
- 👍 Intuitive and clean UI
- 👍 Great for film photography
- 👍 Convenient pocket-sized tool

**What reviewers complain about**

- 😞 Terrible customer service
- 😞 Unresponsive support
- 😞 Expensive hardware
- 😞 Misleading advertising
- 😞 Inconsistent accuracy

**Reported bugs**

- 🐛 LUX value shown as FootCandle
- 🐛 ISO keeps changing when metering
- 🐛 Color temp readout option disappeared
- 🐛 Error when factory resetting module
- 🐛 Cannot read CCT

**Requested features**

- 💡 Aperture priority mode
- 💡 Ability to lock aperture
- 💡 Analog style shutter speed/aperture display
- 💡 Option to see all equivalent exposure settings at a glance
- 💡 Ability to take two readings and see difference in stops


## Frequently asked questions

### Is Massive Dev Chart Timer free?

Massive Dev Chart Timer costs $9.99, with no in-app purchases.

### Is Lumu Light Meter free?

Lumu Light Meter is free to download, with in-app purchases available.

### Which has better reviews, Massive Dev Chart Timer or Lumu Light Meter?

Massive Dev Chart Timer is rated higher. Massive Dev Chart Timer averages 3.7 out of 5 from 54 ratings, while Lumu Light Meter averages 3.4 from 99 ratings.

### Do Massive Dev Chart Timer or Lumu Light Meter have ads?

Neither Massive Dev Chart Timer nor Lumu Light Meter shows ads.

### Which is updated more often, Massive Dev Chart Timer or Lumu Light Meter?

Massive Dev Chart Timer ships an update every 5 months, and Lumu Light Meter monthly. Most recently, Massive Dev Chart Timer was updated on September 23, 2026 and Lumu Light Meter on September 19, 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.*