Zone System vs MeterGlass
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Zone System
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.
- Measure shadows and highlights
- Aperture and development calculations
- Preview results with film presets
- ISO and EV calculations
- Simplified Zone System application
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Zone System is a practical tool for applying Ansel Adams’ exposure and development method. • Measure shadows and highlights to set exposure • Get aperture and development (N, N+, N–) calculations • Preview results with film stock presets • Get calculations for aperture, shutter speed, ISO, and EV This app makes the Zone System simpler, faster, and more reliable.
MeterGlass
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MeterGlass is a professional light meter built for film and large format photographers. Metering • Average metering and ~1.5° spot metering with a live acceptance-angle readout; pinch to zoom in tighter • Zone System: multi-point capture and placement, scene contrast and N+/N- development suggestions, shareable metering cards • Calibration in 0.1 EV steps against a gray card or a meter you trust Film formats • Nine format masks from 135 to 8x10 (including 6x12/6x17 panoramic) with in-mask metering • Live equivalent focal length per format, portrait/landscape framing, zoom with 5mm detents Exposure • EV, aperture/shutter pairs, exposure compensation, illuminance (lux) and color temperature • Filter factors (yellow/orange/red/ND) and bellows extension compensation, folded into suggestions automatically • ISO 20–25600, apertures f/1–f/256, full/half/third-stop steps Instrument-style interface, six languages, fully offline, zero data collection.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Zone System | MeterGlass |
|---|---|---|
| Price | $1.99 — better | $9.99 |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 9 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #192 — better | — |
| Devices | iPhone, iPad, Apple Watch, Vision Pro — better | iPhone, iPad |
| Requires iOS | 17 | 17.0 |
| Further details — not scored | ||
| Size | 12 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Davin Nguyen | 存滨 崔 |
In-app purchases
Zone System
No in-app purchases
MeterGlass
No in-app purchases
