# Massive Dev Chart Timer vs ZoneCalc

The clearest difference is price: ZoneCalc at Free against Massive Dev Chart Timer's $9.99. ZoneCalc also leads on rating (5.0 vs 3.7) and update cadence (every 3 weeks vs every 5 months). Massive Dev Chart Timer's advantage is in-app purchases (none vs 1) and ratings volume (54 vs 2). On ads there is nothing between them.

ZoneCalc is free to download; Massive Dev Chart Timer costs $9.99 up front. ZoneCalc sells 1 one-off in-app purchase. Massive Dev Chart Timer asks for nothing beyond the download.

ZoneCalc holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Massive Dev Chart Timer has 54 ratings behind it against 2, so its average is the more settled of the two.

Massive Dev Chart Timer ships an update every 5 months, ZoneCalc every 3 weeks. The most recent releases landed on October 1, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Massive Dev Chart Timer | ZoneCalc |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [3.7 (54 ratings)](https://appshunter.io/ios/app/massive-dev-chart-timer/id402405770/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/zonecalc-zone-system-meter/id6772102746/reviews)** |
| Number of ratings | **54** | 2 |
| Positive reviews | 70.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Paid | **Freemium** |
| Best chart rank | **#79** | — |
| Size | 14 MB | 3 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Freestyle Photo & Imaging](https://appshunter.io/developer/1786429988) | [Juergen Suk](https://appshunter.io/developer/6772102748) |

## What reviewers say

### Massive Dev Chart Timer

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

**Currently charting:** #79 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


### ZoneCalc

[App page](https://appshunter.io/ios/app/zonecalc-zone-system-meter/id6772102746)

This app assists photographers in precisely calculating exposure and tonal placement using Ansel Adams' Zone System. It offers features for metering, reciprocity correction, and development adjustments, with options for multi-point measurements and data export.

**Highlights:** Zone System exposure calculation, Multi-point metering, Reciprocity correction, Development adjustment recommendations, Film-specific development times, Calculation history and export

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ZoneCalc Pro | $3.99 | one-time |


## Frequently asked questions

### Is Massive Dev Chart Timer free?

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

### Is ZoneCalc free?

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

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

ZoneCalc is rated higher. Massive Dev Chart Timer averages 3.7 out of 5 from 54 ratings, while ZoneCalc averages 5.0 from 2 ratings.

### Do Massive Dev Chart Timer or ZoneCalc have ads?

Neither Massive Dev Chart Timer nor ZoneCalc shows ads.

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

Massive Dev Chart Timer ships an update every 5 months, and ZoneCalc every 3 weeks. Most recently, Massive Dev Chart Timer was updated on October 1, 2026 and ZoneCalc on September 26, 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.*