# Reciprocity Timer vs ZoneCalc

The clearest difference is price: ZoneCalc at Free against Reciprocity Timer's $1.99. ZoneCalc also leads on rating (5.0 vs 2.5) and update cadence (every 3 weeks vs every 2 months). Reciprocity Timer's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 17.6). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

ZoneCalc is free to download; Reciprocity Timer costs $1.99 up front. Reciprocity Timer sells 1 one-off in-app purchase and ZoneCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ZoneCalc holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 4 and 3 respectively.

Reciprocity Timer ships an update every 2 months, ZoneCalc every 3 weeks. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Reciprocity Timer | ZoneCalc |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [2.5 (4 ratings)](https://appshunter.io/ios/app/reciprocity-timer/id459691262/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/zonecalc-zone-system-meter/id6772102746/reviews)** |
| Number of ratings | **4** | 3 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 28 MB | 3 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Pump Interactive](https://appshunter.io/developer/459691265) | [Juergen Suk](https://appshunter.io/developer/6772102748) |

## What reviewers say

### Reciprocity Timer

[App page](https://appshunter.io/ios/app/reciprocity-timer/id459691262)

This app helps film photographers calculate exposure compensation for reciprocity failure. It offers a standard version for basic calculations and a pro version with advanced features like note-taking and custom film databases. It also includes an exposure timer and filter compensation tools.

**Highlights:** Reciprocity compensation calculations, Exposure timer, Filter compensation slider, Note-keeping feature, Custom film and camera databases, Film stock favorites

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reciprocity Timer Pro | $9.99 | one-time |


### 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 Reciprocity Timer free?

Reciprocity Timer costs $1.99, and also offers in-app purchases.

### Is ZoneCalc free?

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

### Which has better reviews, Reciprocity Timer or ZoneCalc?

ZoneCalc is rated higher. Reciprocity Timer averages 2.5 out of 5 from 4 ratings, while ZoneCalc averages 5.0 from 3 ratings.

### Do Reciprocity Timer or ZoneCalc have ads?

Neither Reciprocity Timer nor ZoneCalc shows ads.

### Which is updated more often, Reciprocity Timer or ZoneCalc?

Reciprocity Timer ships an update every 2 months, and ZoneCalc every 3 weeks. Most recently, Reciprocity Timer was updated on November 1, 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.*