# Reciprocity Plus vs ZoneCalc

The clearest difference is price: ZoneCalc at Free against Reciprocity Plus's $1.99. ZoneCalc also leads on rating (5.0 vs 4.1) and update cadence (every 3 weeks vs every 4 months). Reciprocity Plus's advantage is in-app purchases (none vs 1) and iOS requirement (15.6 vs 17.6). On ratings volume, ads and device support there is nothing between them.

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

ZoneCalc holds the better App Store score, 5.0 against 4.1. Both are backed by a comparable volume of ratings — 7 and 3 respectively.

Reciprocity Plus ships an update every 4 months, ZoneCalc every 3 weeks. The most recent releases landed on October 26, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Reciprocity Plus | ZoneCalc |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [4.1 (7 ratings)](https://appshunter.io/ios/app/reciprocity-plus/id898649178/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/zonecalc-zone-system-meter/id6772102746/reviews)** |
| Number of ratings | **7** | 3 |
| Positive reviews | 72.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Paid | **Freemium** |
| Size | 8 MB | 3 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Le bord de la piscine](https://appshunter.io/developer/456593417) | [Juergen Suk](https://appshunter.io/developer/6772102748) |

## 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


### 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 Plus free?

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

### Is ZoneCalc free?

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

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

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

### Do Reciprocity Plus or ZoneCalc have ads?

Neither Reciprocity Plus nor ZoneCalc shows ads.

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

Reciprocity Plus ships an update every 4 months, and ZoneCalc every 3 weeks. Most recently, Reciprocity Plus was updated on October 26, 2026 and ZoneCalc on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*