# Massive Dev Chart Timer vs Manual Flash Calculator

The clearest difference is review sentiment: Massive Dev Chart Timer at 71% against Manual Flash Calculator's 0%. Massive Dev Chart Timer also leads on chart position (#40 vs unranked) and iOS requirement (12.0 vs 18.1). Manual Flash Calculator's advantage is price ($2.99 vs $9.99) and update cadence (every 11 days vs every 5 months). On ads, in-app purchases, monetization model and device support there is nothing between them.

Massive Dev Chart Timer costs $9.99 and Manual Flash Calculator $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Massive Dev Chart Timer ships an update every 5 months, Manual Flash Calculator every 11 days. The most recent releases landed on September 23, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Massive Dev Chart Timer | Manual Flash Calculator |
| --- | --- | --- |
| Price | $9.99 | **$2.99** |
| Rating | **[3.7 (54 ratings)](https://appshunter.io/ios/app/massive-dev-chart-timer/id402405770/reviews)** | — |
| Number of ratings | **54** | — |
| Positive reviews | **70.8% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 11 days** |
| Monetization | Paid | Paid |
| Best chart rank | **#40** | — |
| Size | 14 MB | 2 MB |
| Requires iOS | **12.0** | 18.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Freestyle Photo & Imaging](https://appshunter.io/developer/1786429988) | [Winterink](https://appshunter.io/developer/324469683) |

## What reviewers say

### Massive Dev Chart Timer

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

**Currently charting:** #40 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


### Manual Flash Calculator

[App page](https://appshunter.io/ios/app/manual-flash-calculator/id6739006004)

This app assists photographers by calculating camera and flash settings for manual flash photography. It allows users to create gear lists and kits, and then use this information to determine the fourth parameter (like flash power) when any three of the four relevant settings are known.

**Highlights:** Manual flash photography calculator, Configure camera and flash settings, Calculate missing parameter from three inputs, Create and manage gear lists, Organize gear into custom kits, Persistent local data storage

**Features:** macOS Compatibility

**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 Manual Flash Calculator free?

Manual Flash Calculator costs $2.99, with no in-app purchases.

### Do Massive Dev Chart Timer or Manual Flash Calculator have ads?

Neither Massive Dev Chart Timer nor Manual Flash Calculator shows ads.

### Which is updated more often, Massive Dev Chart Timer or Manual Flash Calculator?

Massive Dev Chart Timer ships an update every 5 months, and Manual Flash Calculator every 11 days. Most recently, Massive Dev Chart Timer was updated on September 23, 2026 and Manual Flash Calculator on September 12, 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.*