# f/ Tools vs Exposure Equivalence

The clearest difference is update cadence: f/ Tools at every 2 weeks against Exposure Equivalence's every 3 months. f/ Tools also leads on iOS requirement (15.5 vs 17.0). Exposure Equivalence's advantage is price ($0.99 vs $3.99). On ads, in-app purchases, chart position and device support there is nothing between them.

f/ Tools costs $3.99 and Exposure Equivalence $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

f/ Tools ships an update every 2 weeks, Exposure Equivalence every 3 months. The most recent releases landed on September 23, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | f/ Tools | Exposure Equivalence |
| --- | --- | --- |
| Price | $3.99 | **$0.99** |
| Rating | **[3.7 (6 ratings)](https://appshunter.io/ios/app/f-tools/id668237473/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 93.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Paid | — |
| Best chart rank | #192 | **#116** |
| Size | 12 MB | 2 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [David Quiles](https://appshunter.io/developer/578971109) | [Rob Duell PhD](https://appshunter.io/developer/1458271389) |

## What reviewers say

### f/ Tools

[App page](https://appshunter.io/ios/app/f-tools/id668237473)

**Currently charting:** #192 Top Paid · Photo & Video (US App Store)

This photography tool offers a suite of calculators for concepts like depth of field, print resolution, and flash exposure. It helps users visually grasp complex photographic principles with integrated help and a glossary. The app also includes a camera bag feature with lens limits.

**Highlights:** Graphic depth of field calculator, Graphic Airy disc calculator, Graphic format calculator, Motion freeze calculator, Graphic blur size calculator, Graphic flash exposure calculator, Camera bag with lens limits

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

**In-app purchases:** none


### Exposure Equivalence

[App page](https://appshunter.io/ios/app/exposure-equivalence/id6469605168)

**Currently charting:** #116 Top Paid · Photo & Video (US App Store)

**In-app purchases:** none


## Frequently asked questions

### Is f/ Tools free?

f/ Tools costs $3.99, with no in-app purchases.

### Is Exposure Equivalence free?

Exposure Equivalence costs $0.99, with no in-app purchases.

### Do f/ Tools or Exposure Equivalence have ads?

Neither f/ Tools nor Exposure Equivalence shows ads.

### Which is updated more often, f/ Tools or Exposure Equivalence?

f/ Tools ships an update every 2 weeks, and Exposure Equivalence every 3 months. Most recently, f/ Tools was updated on September 23, 2026 and Exposure Equivalence on September 15, 2026.

### Which is more popular, f/ Tools or Exposure Equivalence?

f/ Tools currently peaks at #192 in the App Store charts, and Exposure Equivalence at #116. Chart position reflects recent download velocity rather than total install base.

---

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