# Massive Dev Chart Timer vs Solar Eclipse Timer

The clearest difference is price: Solar Eclipse Timer at Free against Massive Dev Chart Timer's $9.99. Solar Eclipse Timer also leads on update cadence (monthly vs every 5 months) and ratings volume (560 vs 54). Massive Dev Chart Timer's advantage is in-app purchases (none vs 6) and chart position (#23 vs unranked). On rating, review sentiment, ads and device support there is nothing between them.

Solar Eclipse Timer is free to download; Massive Dev Chart Timer costs $9.99 up front. Solar Eclipse Timer sells 6 one-off in-app purchases. Massive Dev Chart Timer asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 3.7 for Massive Dev Chart Timer against 3.8 for Solar Eclipse Timer. That said, the two scores are not equally well evidenced: Solar Eclipse Timer has 560 ratings behind it against 54, so its average is the more settled of the two. Written reviews are what separate them: 71% of Massive Dev Chart Timer's written reviews are positive against 68% of Solar Eclipse Timer's.

Massive Dev Chart Timer ships an update every 5 months, Solar Eclipse Timer monthly. The most recent releases landed on September 23, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Massive Dev Chart Timer | Solar Eclipse Timer |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [3.7 (54 ratings)](https://appshunter.io/ios/app/massive-dev-chart-timer/id402405770/reviews) | **[3.8 (560 ratings)](https://appshunter.io/ios/app/solar-eclipse-timer/id1203105865/reviews)** |
| Number of ratings | 54 | **560** |
| Positive reviews | **70.8% of reviews** | 68.4% 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 | **#23** | — |
| Size | 14 MB | 231 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Freestyle Photo & Imaging](https://appshunter.io/developer/1786429988) | [Foxwood Astronomy, LLC.](https://appshunter.io/developer/1180239027) |

## What reviewers say

### Massive Dev Chart Timer

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

**Currently charting:** #23 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


### Solar Eclipse Timer

[App page](https://appshunter.io/ios/app/solar-eclipse-timer/id1203105865)

This app provides precise countdowns and reminders for solar eclipse phenomena, aiding both casual observers and photographers. It works offline and offers features like automatic partial-phase image timing and a dedicated photographer mode.

**Highlights:** Offline eclipse timing, Precise contact time calculation, Photographer mode, Automatic partial-phase image timing, Geolocation and manual coordinate entry, Audio and notification tests

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Total - 7/2/19; Chile, Argenti | $1.99 | one-time |
| Total - 12/14/20; Chile, Argen | $1.99 | one-time |
| Total – 12/4/21; Antarctica | $1.99 | one-time |
| Hybrid – 4/20/23; Australia | $1.99 | one-time |
| Total – 4/8/24; USA, Mexico | $1.99 | one-time |
| Solar Eclipse Timer | $1.99 | one-time |

**What reviewers like**

- 🚀 Accurate timing and announcements
- 👍 Enhanced eclipse viewing experience
- 🎉 Worked flawlessly for 2017 and 2024 eclipses
- 💡 Helpful for photographers and non-photographers
- 🔊 Useful audio cues and prompts

**What reviewers complain about**

- 🐛 Occasional crashes or glitches
- 🔍 Confusing or cluttered user interface
- 🔋 Audio prompts not working in some cases
- 🗺️ Inaccurate location detection or totality information

**Reported bugs**

- App crashing when loading timing data
- Notifications not working when camera is in use
- Incorrect contact times displayed for some locations

**Requested features**

- Customizable reminders or timers
- Automatic time zone and location updates
- Lunar eclipse support
- Improved onboarding and tutorial
- Countdown timer with graphical depiction


## Frequently asked questions

### Is Massive Dev Chart Timer free?

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

### Is Solar Eclipse Timer free?

Solar Eclipse Timer is free to download, with in-app purchases available.

### Which has better reviews, Massive Dev Chart Timer or Solar Eclipse Timer?

Solar Eclipse Timer is rated higher. Massive Dev Chart Timer averages 3.7 out of 5 from 54 ratings, while Solar Eclipse Timer averages 3.8 from 560 ratings.

### Do Massive Dev Chart Timer or Solar Eclipse Timer have ads?

Neither Massive Dev Chart Timer nor Solar Eclipse Timer shows ads.

### Which is updated more often, Massive Dev Chart Timer or Solar Eclipse Timer?

Massive Dev Chart Timer ships an update every 5 months, and Solar Eclipse Timer monthly. Most recently, Massive Dev Chart Timer was updated on September 23, 2026 and Solar Eclipse Timer on September 20, 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.*