# Spot Meter Pro vs Zone System

The clearest difference is rating: Zone System at 5.0 against Spot Meter Pro's 4.5. Zone System also leads on review sentiment (100% vs 67%) and update cadence (every 9 days vs every 2 months). Spot Meter Pro's advantage is ratings volume (22 vs 3) and iOS requirement (14.4 vs 17). On ads, in-app purchases, monetization model and device support there is nothing between them.

Spot Meter Pro costs $4.99 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 4.5. That said, the two scores are not equally well evidenced: Spot Meter Pro has 22 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 67% of Spot Meter Pro's written reviews are positive against 100% of Zone System's.

Spot Meter Pro ships an update every 2 months, Zone System every 9 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Spot Meter Pro | Zone System |
| --- | --- | --- |
| Price | $4.99 | **$1.99** |
| Rating | [4.5 (22 ratings)](https://appshunter.io/ios/app/spot-meter-pro/id1558581037/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/zone-system/id6741873549/reviews)** |
| Number of ratings | **22** | 3 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Paid | Paid |
| Size | 75 MB | 12 MB |
| Requires iOS | **14.4** | 17 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Apple Watch, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Tebo Labs Inc.](https://appshunter.io/developer/1444921808) | [Davin Nguyen](https://appshunter.io/developer/1680398335) |

## What reviewers say

### Spot Meter Pro

[App page](https://appshunter.io/ios/app/spot-meter-pro/id1558581037)

This app functions as a professional light meter for film photography, measuring light within a 2° angle of view. It offers customizable settings for aperture, shutter speed, and film speed, along with logging capabilities for readings.

**Highlights:** 2° FOV light metering, Av and Tv priority modes, Zone System and Tone Picker metering, Customizable increments and range, Log readings, 1° FOV with telephoto lens, Meter calibration

**In-app purchases:** none


### 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 Spot Meter Pro free?

Spot Meter Pro costs $4.99, with no in-app purchases.

### Is Zone System free?

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

### Which has better reviews, Spot Meter Pro or Zone System?

Zone System is rated higher. Spot Meter Pro averages 4.5 out of 5 from 22 ratings, while Zone System averages 5.0 from 3 ratings.

### Do Spot Meter Pro or Zone System have ads?

Neither Spot Meter Pro nor Zone System shows ads.

### Which is updated more often, Spot Meter Pro or Zone System?

Spot Meter Pro ships an update every 2 months, and Zone System every 9 days. Most recently, Spot Meter Pro was updated on October 25, 2026 and Zone System on October 24, 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.*