# Zone Tool vs ZoneCalc

The clearest difference is price: ZoneCalc at Free against Zone Tool's $0.99. ZoneCalc also leads on rating (5.0 vs 2.8) and update cadence (every 3 weeks vs every 38 months). Zone Tool's advantage is in-app purchases (none vs 1) and chart position (#197 vs unranked). On ads and device support there is nothing between them.

ZoneCalc is free to download; Zone Tool costs $0.99 up front. ZoneCalc sells 1 one-off in-app purchase. Zone Tool asks for nothing beyond the download.

ZoneCalc holds the better App Store score, 5.0 against 2.8. Both are backed by a comparable volume of ratings — 6 and 2 respectively.

Zone Tool ships an update every 38 months, ZoneCalc every 3 weeks. The most recent releases landed on August 24, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Zone Tool | ZoneCalc |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [2.8 (6 ratings)](https://appshunter.io/ios/app/zone-tool/id1489637620/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/zonecalc-zone-system-meter/id6772102746/reviews)** |
| Number of ratings | **6** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 3 weeks** |
| Monetization | Paid | **Freemium** |
| Best chart rank | **#197** | — |
| Size | 0 MB | 3 MB |
| Requires iOS | **12.2** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jouni Erola](https://appshunter.io/developer/295758397) | [Juergen Suk](https://appshunter.io/developer/6772102748) |

## What reviewers say

### Zone Tool

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

**Currently charting:** #197 Top Paid · Photo & Video (US App Store)

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


### 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 Zone Tool free?

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

### Is ZoneCalc free?

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

### Which has better reviews, Zone Tool or ZoneCalc?

ZoneCalc is rated higher. Zone Tool averages 2.8 out of 5 from 6 ratings, while ZoneCalc averages 5.0 from 2 ratings.

### Do Zone Tool or ZoneCalc have ads?

Neither Zone Tool nor ZoneCalc shows ads.

### Which is updated more often, Zone Tool or ZoneCalc?

Zone Tool ships an update every 38 months, and ZoneCalc every 3 weeks. Most recently, Zone Tool was updated on August 24, 2026 and ZoneCalc on September 9, 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.*