# Long Exposure Timer vs ZoneCalc

The clearest difference is price: ZoneCalc at Free against Long Exposure Timer's $1.99. ZoneCalc also leads on update cadence (every 3 weeks vs every 23 months). Long Exposure Timer's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On ads there is nothing between them.

ZoneCalc is free to download; Long Exposure Timer costs $1.99 up front. ZoneCalc sells 1 one-off in-app purchase. Long Exposure Timer asks for nothing beyond the download.

Long Exposure Timer ships an update every 23 months, ZoneCalc every 3 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Long Exposure Timer | ZoneCalc |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/zonecalc-zone-system-meter/id6772102746/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 23 months | **Every 3 weeks** |
| Monetization | — | Freemium |
| Size | 2 MB | 3 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Peter Holdmann](https://appshunter.io/developer/1053342563) | [Juergen Suk](https://appshunter.io/developer/6772102748) |

## What reviewers say

### Long Exposure Timer

[App page](https://appshunter.io/ios/app/long-exposure-timer/id1564211090)

**Features:** Apple Watch app

**In-app purchases:** none


### 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 Long Exposure Timer free?

Long Exposure Timer costs $1.99, with no in-app purchases.

### Is ZoneCalc free?

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

### Do Long Exposure Timer or ZoneCalc have ads?

Neither Long Exposure Timer nor ZoneCalc shows ads.

### Which is updated more often, Long Exposure Timer or ZoneCalc?

Long Exposure Timer ships an update every 23 months, and ZoneCalc every 3 weeks. Most recently, Long Exposure Timer was updated on October 30, 2026 and ZoneCalc on October 31, 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.*