# Reciprocitize — Long Exposure Timer for Film

> Long Exposure Timer for Film (iPhone/iPad app by Joe Scotto.)

- Source: https://appshunter.io/ios/app/reciprocitize/id6736762955 (this page in markdown: same URL + `.md`)
- Developer: [Joe Scotto](https://appshunter.io/developer/1378536054)
- Category: Photo & Video, Utilities
- Price: $4.99
- Age rating: 4+
- Requires: iOS 18.0 · 2 MB
- Languages: American English
- Released: 2024-10-23
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/reciprocitize/id6736762955/reviews.md

## What is Reciprocitize?

Reciprocitize is a tool for long exposures on film or digital with reciprocity correction and filter offsets to remove the mental math and make your life easier!

The app includes corrections for the most common Foma, Harman, Ilford, Kentmere, and Kodak film stocks. There is also a custom mode where you can set your own values if using a film that is not included by default. If your don't need reciprocity correction, when shooting digital for example, simply disable it with the button in the top left.

Reciprocitize also features a filter correction setting where you can take away the mental math and quickly get your adjusted exposure when color or ND filters.


## Version history (last 2 releases)

### 1.1.0 — 2024-10-25

- Film visibility will save before exiting settings.
- Use formula instead of P-Factor where applicable.
- Add haptics when interacting with certain fields.
- Add Kodak T-Max 3200
- Add Arista EDU Ultra 100
- Add Arista EDU Ultra 200
- Add Arista EDU Ultra 400
- Add Generic Slide Film

### 1.0.0 — 2024-10-23

No release notes.

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## More apps by Joe Scotto

- [mmCalc](https://appshunter.io/ios/app/mmcalc/id1378536055)

All apps by Joe Scotto: https://appshunter.io/developer/1378536054

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-19.*