# Drop Calculator vs Chronodev

The clearest difference is rating: Drop Calculator at 5.0 against Chronodev's 4.5. Drop Calculator also leads on iOS requirement (15.5 vs 17.0). Chronodev's advantage is in-app purchases (none vs 5). On price, ratings volume, ads and monetization model there is nothing between them.

Both are free to download. Drop Calculator sells 5 one-off in-app purchases. Chronodev asks for nothing beyond the download.

Drop Calculator holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

## The numbers

| Metric | Drop Calculator | Chronodev |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/drop-calculator/id6443909592/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/chronodev-darkroom-timer/id6478027671/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Monthly |
| Monetization | Free | Free |
| Size | 1 MB | 2 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Randy Ennis](https://appshunter.io/developer/1650503392) | [Kevin Olmats](https://appshunter.io/developer/1480968856) |

## What reviewers say

### Drop Calculator

[App page](https://appshunter.io/ios/app/drop-calculator/id6443909592)

This tool helps artists calculate the precise number of drops of light-sensitive emulsion needed for alternative process printing. It supports various printing methods and allows for customization of drop counts, measurement systems, and user presets for different paper types and processes.

**Highlights:** Calculates total drops needed, Breaks down drops per component, Customizable drop count adjustment, Supports two or three-part processes, Create and save user presets, Metric or Imperial measurement options

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Breakfast Taco | $0.99 | one-time |
| Dos Tacos | $1.99 | one-time |
| Dos Tacos and Iced Tea | $3.99 | one-time |
| Puffy Taco Plate | $5.99 | one-time |
| Tex-Mex Taco Plate | $9.99 | one-time |


### Chronodev

[App page](https://appshunter.io/ios/app/chronodev-darkroom-timer/id6478027671)

This app transforms your iPhone or iPad into a darkroom enlarger timer. It uses HomeKit-enabled devices to control your enlarger and safelights, offering features like manual control, metronome for dodging/burning, and automatic test strip creation.

**Highlights:** iPhone/iPad enlarger timer, HomeKit device control, Manual enlarger focusing, Metronome for dodging/burning, EV stop time adjustments, Automatic test strip creation, Voice control support

**In-app purchases:** none


## Frequently asked questions

### Is Drop Calculator free?

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

### Is Chronodev free?

Chronodev is free to download, with no in-app purchases.

### Which has better reviews, Drop Calculator or Chronodev?

Drop Calculator is rated higher. Drop Calculator averages 5.0 out of 5 from 1 ratings, while Chronodev averages 4.5 from 2 ratings.

### Do Drop Calculator or Chronodev have ads?

Neither Drop Calculator nor Chronodev shows ads.

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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.*