# DoF plus vs BTZS ExpoDev

The clearest difference is price: DoF plus at $0.99 against BTZS ExpoDev's $24.99. DoF plus also leads on update cadence (every 2 months vs every 12 months) and rating (5.0 vs 4.8). BTZS ExpoDev's advantage is ratings volume (5 vs 1) and iOS requirement (13.7 vs 18.6). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

DoF plus costs $0.99 and BTZS ExpoDev $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.

DoF plus holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: BTZS ExpoDev has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 80% of DoF plus's written reviews are positive against 83% of BTZS ExpoDev's, so the app with the better star average is not the one people write more warmly about.

DoF plus ships an update every 2 months, BTZS ExpoDev every 12 months. The most recent releases landed on October 29, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | DoF plus | BTZS ExpoDev |
| --- | --- | --- |
| Price | **$0.99** | $24.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dof-plus/id309381301/reviews)** | [4.8 (5 ratings)](https://appshunter.io/ios/app/btzs-expodev/id507385770/reviews) |
| Number of ratings | 1 | **5** |
| Positive reviews | 80.0% of reviews | **83.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 12 months |
| Monetization | Paid | Paid |
| Size | 2 MB | 16 MB |
| Requires iOS | 18.6 | **13.7** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jean-Christoph KAISER](https://appshunter.io/developer/309381304) | [TinyOctopus, LLC](https://appshunter.io/developer/507385773) |

## What reviewers say

### DoF plus

[App page](https://appshunter.io/ios/app/dof-plus/id309381301)

This app helps digital camera owners calculate depth of field, hyperfocal distance, and field of view. It allows customization of camera models, focal lenses, and apertures for precise photographic planning.

**Highlights:** Depth of field calculation, Hyperfocal distance calculation, Field of view calculation, Customizable camera models, Customizable focal lenses, Customizable apertures

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is DoF plus free?

DoF plus costs $0.99, with no in-app purchases.

### Is BTZS ExpoDev free?

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

### Which has better reviews, DoF plus or BTZS ExpoDev?

DoF plus is rated higher. DoF plus averages 5.0 out of 5 from 1 ratings, while BTZS ExpoDev averages 4.8 from 5 ratings.

### Do DoF plus or BTZS ExpoDev have ads?

Neither DoF plus nor BTZS ExpoDev shows ads.

### Which is updated more often, DoF plus or BTZS ExpoDev?

DoF plus ships an update every 2 months, and BTZS ExpoDev every 12 months. Most recently, DoF plus was updated on October 29, 2026 and BTZS ExpoDev on October 7, 2026.

---

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