# BTZS ExpoDev vs DevGlass

The clearest difference is price: DevGlass at $7.99 against BTZS ExpoDev's $24.99. DevGlass also leads on update cadence (monthly vs every 12 months). BTZS ExpoDev's advantage is iOS requirement (13.7 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

BTZS ExpoDev costs $24.99 and DevGlass $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

BTZS ExpoDev ships an update every 12 months, DevGlass monthly. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | BTZS ExpoDev | DevGlass |
| --- | --- | --- |
| Price | $24.99 | **$7.99** |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/btzs-expodev/id507385770/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Monthly** |
| Monetization | Paid | — |
| Size | 16 MB | 9 MB |
| Requires iOS | **13.7** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TinyOctopus, LLC](https://appshunter.io/developer/507385773) | [存滨 崔](https://appshunter.io/developer/1809703940) |

## What reviewers say

### BTZS ExpoDev

[App page](https://appshunter.io/ios/app/btzs-expodev/id507385770)

This app helps traditional film photographers accurately expose black and white film using custom film test data. It calculates precise exposures and development times in the field for consistent results and easier darkroom printing.

**Highlights:** Exposure record keeping, Film Profile, lens, and filter management, Incident and Zone System metering support, Depth of Field calculator, Reciprocity failure adjustments, Integrated exposure timer

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

**In-app purchases:** none


### DevGlass

[App page](https://appshunter.io/ios/app/devglass/id6762206948)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BTZS ExpoDev free?

BTZS ExpoDev costs $24.99, with no in-app purchases.

### Is DevGlass free?

DevGlass costs $7.99, with no in-app purchases.

### Do BTZS ExpoDev or DevGlass have ads?

Neither BTZS ExpoDev nor DevGlass shows ads.

### Which is updated more often, BTZS ExpoDev or DevGlass?

BTZS ExpoDev ships an update every 12 months, and DevGlass monthly. Most recently, BTZS ExpoDev was updated on October 7, 2026 and DevGlass on October 1, 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.*