# Reciprocity Timer vs Zone System

The clearest difference is review sentiment: Zone System at 100% against Reciprocity Timer's 33%. Zone System also leads on rating (5.0 vs 2.5) and in-app purchases (none vs 1). Reciprocity Timer's advantage is chart position (#108 vs unranked) and iOS requirement (12.0 vs 17). On price, ratings volume, ads and device support there is nothing between them.

Reciprocity Timer costs $1.99 and Zone System $1.99 up front. Reciprocity Timer sells 1 one-off in-app purchase. Zone System asks for nothing beyond the download.

Zone System holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 4 and 3 respectively. Written reviews point the same way: 33% of Reciprocity Timer's written reviews are positive against 100% of Zone System's.

Reciprocity Timer ships an update every 2 months, Zone System every 9 days. The most recent releases landed on October 13, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Reciprocity Timer | Zone System |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| Rating | [2.5 (4 ratings)](https://appshunter.io/ios/app/reciprocity-timer/id459691262/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/zone-system/id6741873549/reviews)** |
| Number of ratings | **4** | 3 |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | **#108** | — |
| Size | 28 MB | 12 MB |
| Requires iOS | **12.0** | 17 |
| Devices | iPhone, iPod, Apple Watch | **iPhone, iPad, Apple Watch, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Pump Interactive](https://appshunter.io/developer/459691265) | [Davin Nguyen](https://appshunter.io/developer/1680398335) |

## What reviewers say

### Reciprocity Timer

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

**Currently charting:** #108 Top Paid · Photo & Video (US App Store)

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 |


### Zone System

[App page](https://appshunter.io/ios/app/zone-system/id6741873549)

This tool simplifies Ansel Adams' exposure and development method for photographers. It helps measure shadows and highlights, calculate aperture and development times, and preview results with film stock presets.

**Highlights:** Measure shadows and highlights, Aperture and development calculations, Preview results with film presets, ISO and EV calculations, Simplified Zone System application

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Reciprocity Timer free?

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

### Is Zone System free?

Zone System costs $1.99, with no in-app purchases.

### Which has better reviews, Reciprocity Timer or Zone System?

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

### Do Reciprocity Timer or Zone System have ads?

Neither Reciprocity Timer nor Zone System shows ads.

### Which is updated more often, Reciprocity Timer or Zone System?

Reciprocity Timer ships an update every 2 months, and Zone System every 9 days. Most recently, Reciprocity Timer was updated on October 13, 2026 and Zone System on October 2, 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.*