# Reciprocity Timer vs Zone Tool

The clearest difference is review sentiment: Zone Tool at 100% against Reciprocity Timer's 33%. Zone Tool also leads on in-app purchases (none vs 1) and rating (2.8 vs 2.5). Reciprocity Timer's advantage is update cadence (every 2 months vs every 38 months) and chart position (#104 vs unranked). On ratings volume, ads, device support and iOS requirement there is nothing between them.

Reciprocity Timer costs $1.99 and Zone Tool $0.99 up front. Reciprocity Timer sells 1 one-off in-app purchase. Zone Tool asks for nothing beyond the download.

Zone Tool holds the better App Store score, 2.8 against 2.5. Both are backed by a comparable volume of ratings — 4 and 6 respectively. Written reviews point the same way: 33% of Reciprocity Timer's written reviews are positive against 100% of Zone Tool's.

Reciprocity Timer ships an update every 2 months, Zone Tool every 38 months. The most recent releases landed on October 8, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Reciprocity Timer | Zone Tool |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| Rating | [2.5 (4 ratings)](https://appshunter.io/ios/app/reciprocity-timer/id459691262/reviews) | **[2.8 (6 ratings)](https://appshunter.io/ios/app/zone-tool/id1489637620/reviews)** |
| Number of ratings | 4 | **6** |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 38 months |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | **#104** | — |
| Size | 28 MB | 0 MB |
| Requires iOS | **12.0** | 12.2 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pump Interactive](https://appshunter.io/developer/459691265) | [Jouni Erola](https://appshunter.io/developer/295758397) |

## What reviewers say

### Reciprocity Timer

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

**Currently charting:** #104 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 Tool

[App page](https://appshunter.io/ios/app/zone-tool/id1489637620)

Calculate photographic exposure and development adjustments using zone system theory. Measure shadows and highlights, input film ISO and desired shutter speed to determine aperture and development time modifications.

**Highlights:** Zone system exposure calculation, Shadow and highlight measurement, Film ISO input, Shutter speed adjustment, Development time calculation, Aperture determination

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Reciprocity Timer free?

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

### Is Zone Tool free?

Zone Tool costs $0.99, with no in-app purchases.

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

Zone Tool is rated higher. Reciprocity Timer averages 2.5 out of 5 from 4 ratings, while Zone Tool averages 2.8 from 6 ratings.

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

Neither Reciprocity Timer nor Zone Tool shows ads.

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

Reciprocity Timer ships an update every 2 months, and Zone Tool every 38 months. Most recently, Reciprocity Timer was updated on October 8, 2026 and Zone Tool on September 21, 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.*