Spot Meter Pro vs Zone System
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Spot Meter Pro
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.
- 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
Read full descriptionHide full description
An essential tool for film photography. Designed to function like a real spot meter, Spot Meter Pro measures light within a 2° circular angle of view for accurate exposure value readings. Select your film speed, then adjust aperture or shutter speed for Av or Tv priority. Optionally, adjust the “middle-grey” reading using the Zone System or Tone Picker metering modes to achieve your desired exposure. Additional features: - Customize aperture, shutter speed, and film speed increments and range - Log readings for future reference - iOS devices equipped with a telephoto lens can take a 1° circular angle of view reading - Calibrate the light meter in 1/10th increments - Toggle black & white mode
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
Read full descriptionHide full description
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.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Spot Meter Pro | Zone System |
|---|---|---|
| Price | $4.99 | $1.99 — better |
| Rating | 4.5 (22 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 66.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 22 — better | 3 |
| Update frequency | Every 2 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch, Vision Pro — better |
| Requires iOS | 14.4 — better | 17 |
| Further details — not scored | ||
| Size | 75 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Tebo Labs Inc. | Davin Nguyen |
Customer experience
Spot Meter Pro
Zone System
In-app purchases
Spot Meter Pro
No in-app purchases
Zone System
No in-app purchases
Questions
Is Spot Meter Pro free?
Is Zone System free?
Which has better reviews, Spot Meter Pro or Zone System?
Do Spot Meter Pro or Zone System have ads?
Which is updated more often, Spot Meter Pro or Zone System?
Other comparisons
