# f/oss — Light meter for photography

> Light meter for photography (iPhone/iPad app by Luca Tescari.)

- Source: https://appshunter.io/ios/app/foss/id6761634199 (this page in markdown: same URL + `.md`)
- Developer: [Luca Tescari](https://appshunter.io/developer/1633824637)
- Category: Photo & Video, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 1 MB
- Languages: American English
- Released: 2026-04-07
- Data updated: 2026-08-28
- User reviews in markdown: https://appshunter.io/ios/app/foss/id6761634199/reviews.md

## What is f/oss?

f/oss is a free light meter for film photography, rebuilt from the ground up as a fully native app.

Point the spot-metering circle at your subject and read the exposure instantly. f/oss measures true photometric luminance through your iPhone's camera and is calibrated against professional reference meters.

FIVE METERING MODES
• Aperture Priority: set f-stop and ISO, get your shutter speed
• Shutter Priority: set shutter and ISO, get your f-stop
• Exposure Value: read the scene's EV directly
• Cine: shutter angle and frame rate for filmmakers
• Manual: check your chosen settings against the metered scene

BUILT FOR REAL CAMERAS
• Camera profiles: save your bodies with their actual shutter and bias limits
• Full, half or third stop increments
• Configurable shutter, aperture, ISO and exposure bias ranges
• Reference lock: freeze a reading and measure scene contrast in stops
• Exposure lock for recompose workflows

ACCURATE
• True spot metering of exactly the circle you see
• Full-color light analysis: reads saturated LED and neon light correctly
• Verified against professional meters from daylight to low light

FREE, NO SUBSCRIPTION
Every feature is free, forever. If f/oss saves your shots, there is an optional tip jar.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Nice Tip | $1.99 | one-time |
| Generous Tip | $5.99 | one-time |
| Amazing Tip | $9.99 | one-time |



## Version history (last 5 releases)

### 2.0.2 — 2026-08-06

• Added an optional tip jar and an in-app FAQ
• Smoother metering readout with animated digits
• Steadier stop selection with less flicker in the reading
• Fixes and refinements throughout

### 2.0.0 — 2026-07-27

f/oss 2.0 is a complete rewrite — now fully native.

• All-new instrument-deck design
• True spot metering with full-color light analysis — accurate even in LED and neon light
• New Cine mode: shutter angle + frame rate
• New Exposure Value and Manual modes
• Camera profiles: save your cameras and their real limits
• Reference lock: measure scene contrast in stops
• Full/half/third stop increments and configurable ranges
• Faster, lighter — and still completely free

### 1.0.4 — 2026-04-09

- improvements in the metering algorythim
- performance improvements
- UI finalization

### 1.0.3 — 2026-04-07

- Stability improvements and bugfixes

### 1.0.2 — 2026-04-07

No release notes.

## Apps similar to f/oss

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Photographer’s Companion](https://appshunter.io/ios/app/photographers-companion/id6754018456) | — | Free | Photo & Video |
| [Photo Timers](https://appshunter.io/ios/app/photo-timers/id6723898785) | — | Free | Photo & Video |
| [Media List Player](https://appshunter.io/ios/app/media-list-player/id6737306774) | 1.0 (1) | Free | Photo & Video |
| [Proofmode](https://appshunter.io/ios/app/proofmode/id1526270484) | 3.8 (4) | Free | Photo & Video |
| [LightCue - Film Light Meter](https://appshunter.io/ios/app/lightcue-film-light-meter/id6771200881) | 5.0 (2) | Free | Photo & Video |
| [F8t - Light Meter for Film](https://appshunter.io/ios/app/f8t-light-meter-for-film/id6765949306) | — | Free | Photo & Video |

## More apps by Luca Tescari

- [BadiBuddy](https://appshunter.io/ios/app/badibuddy/id6761705291)
- [ParaBuddy: Paragliding Log](https://appshunter.io/ios/app/parabuddy-paragliding-log/id6792259418)

All apps by Luca Tescari: https://appshunter.io/developer/1633824637

## Related topics

[foss](https://appshunter.io/ios/topics/foss)

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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 2026-08-28.*