# Reciprocity Plus vs Zone System

The clearest difference is rating: Zone System at 5.0 against Reciprocity Plus's 4.1. Zone System also leads on review sentiment (100% vs 70%) and update cadence (every 9 days vs every 4 months). Reciprocity Plus's advantage is iOS requirement (15.6 vs 17). On price, ratings volume, ads and in-app purchases there is nothing between them.

Reciprocity Plus costs $1.99 and Zone System $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Zone System holds the better App Store score, 5.0 against 4.1. Both are backed by a comparable volume of ratings — 7 and 3 respectively. Written reviews point the same way: 70% of Reciprocity Plus's written reviews are positive against 100% of Zone System's.

Reciprocity Plus ships an update every 4 months, Zone System every 9 days. The most recent releases landed on September 23, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Reciprocity Plus | Zone System |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| Rating | [4.1 (7 ratings)](https://appshunter.io/ios/app/reciprocity-plus/id898649178/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/zone-system/id6741873549/reviews)** |
| Number of ratings | **7** | 3 |
| Positive reviews | 70.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | Paid | Paid |
| Best chart rank | — | **#192** |
| Size | 8 MB | 12 MB |
| Requires iOS | **15.6** | 17 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Le bord de la piscine](https://appshunter.io/developer/456593417) | [Davin Nguyen](https://appshunter.io/developer/1680398335) |

## What reviewers say

### Reciprocity Plus

[App page](https://appshunter.io/ios/app/reciprocity-plus/id898649178)

This app simplifies long exposure photography calculations for both digital and analog cameras. It includes a vast library of filter effects and reciprocity charts, allowing users to design or modify their own. A built-in timer ensures accurate exposure timing even when the app is not in use.

**Highlights:** Long exposure calculation, 29 filter effects (CTO, CTB, ND, etc.), 110+ reciprocity charts, Customizable chart design, Built-in timer, Support for digital and analog photography

**Features:** Vision Pro support

**In-app purchases:** none


### Zone System

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

**Currently charting:** #192 Top Paid · Photo & Video (US App Store)

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 Plus free?

Reciprocity Plus costs $1.99, with no in-app purchases.

### Is Zone System free?

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

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

Zone System is rated higher. Reciprocity Plus averages 4.1 out of 5 from 7 ratings, while Zone System averages 5.0 from 3 ratings.

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

Neither Reciprocity Plus nor Zone System shows ads.

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

Reciprocity Plus ships an update every 4 months, and Zone System every 9 days. Most recently, Reciprocity Plus was updated on September 23, 2026 and Zone System on September 13, 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.*