# f vs LFTools

The clearest difference is update cadence: LFTools at every 3 months against f's every 29 months. f's advantage is device support (3 vs 1) and iOS requirement (9.0 vs 18). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

f ships an update every 29 months, LFTools every 3 months. The most recent releases landed on October 7, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | f | LFTools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (5 ratings)](https://appshunter.io/ios/app/f-stop-printing-calculator/id858392735/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 1 MB | 4 MB |
| Requires iOS | **9.0** | 18 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Freestyle Photo & Imaging](https://appshunter.io/developer/1786429988) | [Ruediger Merz](https://appshunter.io/developer/1653209743) |

## What reviewers say

### f

[App page](https://appshunter.io/ios/app/f-stop-printing-calculator/id858392735)

This app helps darkroom printers adjust exposure times by f-stop increments. It calculates precise exposure values for printing, offering easier test strip creation by working with equal exposure differences.

**Highlights:** Calculate exposure by f-stop increments, Modify exposure times for printing, Generate new exposure times, Calculate f-stop increments for burning in, Easier test strip creation

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

**In-app purchases:** none


### LFTools

[App page](https://appshunter.io/ios/app/lftools/id6479173686)

**In-app purchases:** none


## Frequently asked questions

### Is f free?

f is free to download, with no in-app purchases.

### Is LFTools free?

LFTools is free to download, with no in-app purchases.

### Do f or LFTools have ads?

Neither f nor LFTools shows ads.

### Which is updated more often, f or LFTools?

f ships an update every 29 months, and LFTools every 3 months. Most recently, f was updated on October 7, 2026 and LFTools on September 11, 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.*