# Massive Dev Chart Timer vs Zone Tool

The clearest difference is rating: Massive Dev Chart Timer at 3.7 against Zone Tool's 2.8. Massive Dev Chart Timer also leads on update cadence (every 5 months vs every 38 months) and chart position (#56 vs unranked). Zone Tool's advantage is price ($0.99 vs $9.99) and review sentiment (100% vs 71%). On ads, in-app purchases, monetization model and device support there is nothing between them.

Massive Dev Chart Timer costs $9.99 and Zone Tool $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Massive Dev Chart Timer holds the better App Store score, 3.7 against 2.8. That said, the two scores are not equally well evidenced: Massive Dev Chart Timer has 54 ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 71% of Massive Dev Chart Timer's written reviews are positive against 100% of Zone Tool's, so the app with the better star average is not the one people write more warmly about.

Massive Dev Chart Timer ships an update every 5 months, Zone Tool every 38 months. The most recent releases landed on October 9, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Massive Dev Chart Timer | Zone Tool |
| --- | --- | --- |
| Price | $9.99 | **$0.99** |
| Rating | **[3.7 (54 ratings)](https://appshunter.io/ios/app/massive-dev-chart-timer/id402405770/reviews)** | [2.8 (6 ratings)](https://appshunter.io/ios/app/zone-tool/id1489637620/reviews) |
| Number of ratings | **54** | 6 |
| Positive reviews | 70.8% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 38 months |
| Monetization | Paid | Paid |
| Best chart rank | **#56** | — |
| Size | 14 MB | 0 MB |
| Requires iOS | **12.0** | 12.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Freestyle Photo & Imaging](https://appshunter.io/developer/1786429988) | [Jouni Erola](https://appshunter.io/developer/295758397) |

## What reviewers say

### Massive Dev Chart Timer

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

**Currently charting:** #56 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


### Zone Tool

[App page](https://appshunter.io/ios/app/zone-tool/id1489637620)

Calculate photographic exposure and development adjustments using zone system theory. Measure shadows and highlights, input film ISO and desired shutter speed to determine aperture and development time modifications.

**Highlights:** Zone system exposure calculation, Shadow and highlight measurement, Film ISO input, Shutter speed adjustment, Development time calculation, Aperture determination

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

**In-app purchases:** none


## Frequently asked questions

### Is Massive Dev Chart Timer free?

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

### Is Zone Tool free?

Zone Tool costs $0.99, with no in-app purchases.

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

Massive Dev Chart Timer is rated higher. Massive Dev Chart Timer averages 3.7 out of 5 from 54 ratings, while Zone Tool averages 2.8 from 6 ratings.

### Do Massive Dev Chart Timer or Zone Tool have ads?

Neither Massive Dev Chart Timer nor Zone Tool shows ads.

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

Massive Dev Chart Timer ships an update every 5 months, and Zone Tool every 38 months. Most recently, Massive Dev Chart Timer was updated on October 9, 2026 and Zone Tool on September 21, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*