Comparison

Reciprocity Timer vs Lightme

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Reciprocity Timer

This app helps film photographers calculate exposure compensation for reciprocity failure. It offers a standard version for basic calculations and a pro version with advanced features like note-taking and custom film databases. It also includes an exposure timer and filter compensation tools.

Highlights
  • Reciprocity compensation calculations
  • Exposure timer
  • Filter compensation slider
  • Note-keeping feature
  • Custom film and camera databases
  • Film stock favorites
Features
Read full description

Manage your film photography from start to finish!  Reciprocity Timer has 2 Version - the "Standard" Version does NOT include advanced features but can be used to calculate reciprocity on a range of common films. The "Pro" Version is available for an additional $9.99 USD (via in-app-purchase) unlocks a range of advanced features. The initial purchase price allows you to calculate reciprocity for all the films included by selecting an observed exposure time. This $1.99 US non-pro version is suitable for people who just need to calculate an exposure that includes reciprocity adjustments for commonly used films. It will suit many users who don't require or need to upgrade to the pro version for features like note keeping or a camera database etc. It's most suitable if you are new to film. More advanced film users and photographers may want to pay to upgrade after their initial purchase to the pro version. If you use a pro-feature you'll be prompted to upgrade for an additional $9.99 US. This will unlock all the additional features including the Zone Editor, Note, Camera and Film Holder database as well as custom films and filters. There is no need to upgrade if you just want to calculate and time reciprocity for a particular film and you always use the same camera. The app includes in-app purchase to unlock pro features including a note-keeping feature, the ability to add custom films and the ability to select often used film stock as favorites. Once you upgrade then the one app does it all - notes, filters, exposure calculations, custom films, zone system editor, film holder management as well as the reciprocity math! A comprehensive film reciprocity calculator for photographers. Select a film type and metered exposure time - the calculator will provide a reciprocity compensated exposure time. The app includes an exposure timer so you can time your long exposures. You can also use a slider to adjust exposure when you have filters attached. The app supports a wide range of film stocks and allows the user to add various common exposure filters such as NDs and Polarizers. Keep detailed notes and share them. Share your adjusted exposure times with colleagues. This app makes film photography a breeze. You may need to setup Reciprocity Timer in Settings -> Notification Center to ensure the app's timer can notify you when exposures are ending and your device is asleep. Watch companion app now included. To install the app use the Apple Watch App on your phone. Ensure your watch and phone are paired an unlocked and scroll down the list of available apps to Reciprocity Timer. Select Install. You can also turn on "Automatically Install Apps".

About

Lightme

This app helps analog photographers meticulously track their film rolls, shots, and development processes. It allows for detailed logging of gear and consumables, with features for data visualization and export. Users can also manage film holders and add post-development notes with photos of final results.

Highlights
  • Log film rolls, shots, and development
  • Track gear and consumables
  • Data visualization with graphs/histograms
  • Data export in JSON/CSV formats
  • Manage large format film holders
  • Post-development notes with photos
Features
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Lightme - Logbook is a clean and powerful tool to record and keep track of your rolls, shots, developments, and all the gear that revolves around shooting film — from 35mm to medium and large format. The idea behind it is simple: logging a shot should take seconds, not steal time from actually shooting. Lightme pairs a beautiful, immediate interface with enough depth and flexibility to fit any workflow, whether you shoot a couple of rolls a year or fill several large format holders in an afternoon. LOGGING, EFFORTLESSLY • Log a shot in seconds: aperture, shutter speed, focal length, filters, bellows correction, measured EV, notes and more • Log straight from your wrist with the companion Apple Watch app, with Siri and Shortcuts, or from the home screen and lock screen widgets • Together with the Lightme Lightmeter app, your meter readings can prefill a new shot automatically • Every shot can carry a location and address, a preview photo, and later its final scan, plus a star rating ROLLS, SHEETS AND DEVELOPMENTS • Track rolls from loading to unloading, with film stocks from a growing database and a processing pipeline: waiting for development, off to the lab, back from the lab, to be scanned, scanned • Keep detailed development notes — developer, dilution, time, temperature, agitation — for rolls and single sheets alike, including push/pull (N+ / N-) development • Add post-development notes and a photo of the final result to rolls, sheets and individual shots YOUR GEAR, ORGANIZED • Cameras and lenses with nicknames, formats (including custom formats you define), pinhole and bellows flags, custom shutter speeds and selectable shutter step sizes • Roll film backs and lens filters with their exposure compensation • Film holders and backs can be marked as compatible with specific cameras, and everything is searchable from a single bar LARGE FORMAT, COVERED • Keep track of your film holders with three states — unloaded, loaded and exposed — always knowing which film is inside each one • Group holders together and follow every sheet from exposure through development INSIGHTS FROM YOUR DATA • Build and save custom queries, filtering by date (fixed or rolling windows), camera, lens, film stock, format, ISO, aperture, shutter speed, focal length and notes • Visualize results with histograms — by camera, lens, film stock, shutter speed, aperture, focal length, ISO, format, rating or hour of the day — alongside aggregate stats like mean aperture and average exposure • Save the queries you use most and re-run them anytime YOUR DATA, YOURS • Everything syncs privately through iCloud across your iPhone and iPad • Export any selection of data as CSV or JSON, or as a beautifully formatted PDF with customizable columns and a contact-sheet mode, bundled with your images in a single ZIP • Batch-write shooting metadata (EXIF) onto your scans — for a whole roll at once, or by matching files from the Files app • Viewing and exporting your data is free, forever; adding and editing is unlocked with a one-time purchase or a subscription AND MORE • Full-text search, favourites and an archive to keep things tidy • Available in English, Italian, Spanish, Japanese and Simplified Chinese • A roadmap of what's coming next lives right in the app — new very cool features are on the way :) If you have any suggestion or issue, write me at lightme.apps@gmail.com Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Reciprocity Timer4 screens
Lightme4 screens

Verdict

The call

The clearest difference is price: Lightme at Free against Reciprocity Timer's $1.99. Lightme also leads on rating (4.8 vs 2.5) and review sentiment (74% vs 33%). Reciprocity Timer's advantage is chart position (#50 vs unranked) and iOS requirement (12.0 vs 17.0). On ads, in-app purchases, monetization model and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Lightme is free to download; Reciprocity Timer costs $1.99 up front. Reciprocity Timer sells 1 one-off in-app purchase and Lightme sells 8 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Lightme holds the better App Store score, 4.8 against 2.5. That said, the two scores are not equally well evidenced: Lightme has 101 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 33% of Reciprocity Timer's written reviews are positive against 74% of Lightme's.

UpkeepUpdate frequency

Reciprocity Timer ships an update every 2 months, Lightme every 9 days. The most recent releases landed on September 21, 2026 and September 23, 2026 respectively.

Scorecard7 real differences · 4 level
Reciprocity Timer versus Lightme: the parameters behind the verdict, then further details
ParameterReciprocity TimerLightme
Price$1.99Free — better
Rating2.5 (4 ratings)4.8 (101 ratings) — better
Positive reviews33.3% of reviews73.9% of reviews — better
Number of ratings4101 — better
Update frequencyEvery 2 monthsEvery 9 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#50 — better—
DevicesiPhone, iPod, Apple WatchiPhone, iPad, Apple Watch
Requires iOS12.0 — better17.0
Further details — not scored
Size28 MB13 MB
Age rating4+4+
DeveloperPump InteractiveGiuseppe Bertolini

Customer experience

Reciprocity Timer

All ratings4 ratings
Positive25.0%
Neutral25.0%
Negative50.0%
Written reviews87 reviews
Positive33.3%
Neutral13.8%
Negative52.9%

Lightme

All ratings101 ratings
Positive97.0%
Neutral0.0%
Negative3.0%
Written reviews23 reviews
Positive73.9%
Neutral13.0%
Negative13.0%

In-app purchases

1 purchases

Reciprocity Timer

One-time1
  • Reciprocity Timer Pro$9.99
8 purchases

Lightme

Subscriptions4
  • 1 Cappuccino7 Days trial$2.991 Month
  • Focaccia Barese7 Days trial$12.991 Year
  • Spaghetti Carbonara7 Days trial$29.991 Year
Show 1 more
  • Homemade Pizza party7 Days trial$49.991 Year
One-time4
  • A smile :)Free
  • Box of Prosecco$59.99
  • Fuel for my '90s camper$119.99
Show 1 more
  • Terme for two$239.99

Questions

Is Reciprocity Timer free?
Reciprocity Timer costs $1.99, and also offers in-app purchases.
Is Lightme free?
Lightme is free to download, with in-app purchases available.
Which has better reviews, Reciprocity Timer or Lightme?
Lightme is rated higher. Reciprocity Timer averages 2.5 out of 5 from 4 ratings, while Lightme averages 4.8 from 101 ratings.
Do Reciprocity Timer or Lightme have ads?
Neither Reciprocity Timer nor Lightme shows ads.
Which is updated more often, Reciprocity Timer or Lightme?
Reciprocity Timer ships an update every 2 months, and Lightme every 9 days. Most recently, Reciprocity Timer was updated on September 21, 2026 and Lightme on September 23, 2026.

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