# Zone System vs MeterGlass

The clearest difference is price: Zone System at $1.99 against MeterGlass's $9.99. Zone System also leads on update cadence (every 9 days vs every 3 weeks) and chart position (#192 vs unranked). On ads, in-app purchases and iOS requirement there is nothing between them.

Zone System costs $1.99 and MeterGlass $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Zone System ships an update every 9 days, MeterGlass every 3 weeks. The most recent releases landed on September 13, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Zone System | MeterGlass |
| --- | --- | --- |
| Price | **$1.99** | $9.99 |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/zone-system/id6741873549/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 3 weeks |
| Monetization | Paid | — |
| Best chart rank | **#192** | — |
| Size | 12 MB | 3 MB |
| Requires iOS | 17 | 17.0 |
| Devices | **iPhone, iPad, Apple Watch, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Davin Nguyen](https://appshunter.io/developer/1680398335) | [存滨 崔](https://appshunter.io/developer/1809703940) |

## What reviewers say

### 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


### MeterGlass

[App page](https://appshunter.io/ios/app/meterglass/id6761722905)

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

**In-app purchases:** none


## Frequently asked questions

### Is Zone System free?

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

### Is MeterGlass free?

MeterGlass costs $9.99, with no in-app purchases.

### Do Zone System or MeterGlass have ads?

Neither Zone System nor MeterGlass shows ads.

### Which is updated more often, Zone System or MeterGlass?

Zone System ships an update every 9 days, and MeterGlass every 3 weeks. Most recently, Zone System was updated on September 13, 2026 and MeterGlass on September 11, 2026.

---

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