# X vs Fujifilm Exposure Calculator

The clearest difference is iOS requirement: X at 8.0 against Fujifilm Exposure Calculator's 16.6. On price, update cadence, 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.

X ships an update every 13 months, Fujifilm Exposure Calculator every 24 months. The most recent releases landed on November 1, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | X | Fujifilm Exposure Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (9 ratings)](https://appshunter.io/ios/app/x-ray-timer/id350390647/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 75.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 13 months** | Every 24 months |
| Monetization | Paid | — |
| Size | 0 MB | 1 MB |
| Requires iOS | **8.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Lance Henderson](https://appshunter.io/developer/348247919) | [nautavis](https://appshunter.io/developer/1203189943) |

## What reviewers say

### X

[App page](https://appshunter.io/ios/app/x-ray-timer/id350390647)

Calculate radiography shot times for industrial radiographers using radioactive materials. Quickly determine exposure time by inputting curies, steel thickness, and source-to-film distance.

**Highlights:** Calculate radiography shot times, Supports Iridium and Cobalt sources, Input curies, thickness, and distance, Field-tested for accuracy, Replaces slide rule calculations

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Saves time and effort
- 🚀 Works great and is accurate
- 👍 Easy to use
- 👍 Reliable for daily work
- 👍 Helpful for training

**What reviewers complain about**

- 🐛 Bugs and crashes
- 🐛 Calculations can be off
- 🐛 Inconsistent results
- 🐛 App crashes on iOS 10
- 🐛 Doesn't work for large pipes

**Reported bugs**

- Crashes if 2 or more fields have a period in it on iOS 10
- App stopped working after recent iOS update
- Shot times are way off when shooting large pipes
- App does not work, inconsistent results with different units or conversions
- Exposure time not correct

**Requested features**

- Save recent calculations
- Memory feature for recent calculations
- Add feature for double/single wall application
- Show density climbing on countdown
- Add wire type selection


### Fujifilm Exposure Calculator

[App page](https://appshunter.io/ios/app/fujifilm-exposure-calculator/id1203189944)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is X free?

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

### Is Fujifilm Exposure Calculator free?

Fujifilm Exposure Calculator is free to download, with no in-app purchases.

### Do X or Fujifilm Exposure Calculator have ads?

Neither X nor Fujifilm Exposure Calculator shows ads.

### Which is updated more often, X or Fujifilm Exposure Calculator?

X ships an update every 13 months, and Fujifilm Exposure Calculator every 24 months. Most recently, X was updated on November 1, 2026 and Fujifilm Exposure Calculator on October 6, 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.*