# Reciprocity Timer — user reviews > 87 indexed App Store user reviews of Reciprocity Timer by Pump Interactive, rated 3.00/5 from 3 ratings. - Source: https://appshunter.io/ios/app/reciprocity-timer/id459691262/reviews - App overview in markdown: https://appshunter.io/ios/app/reciprocity-timer/id459691262.md - Rating breakdown: 5★ 1 · 4★ 0 · 3★ 1 · 2★ 0 · 1★ 1 ## Newest reviews (15 of 87) ### 4/5 — Timer *2026-03-15, version 3.99* Really handy app for shooting larger formats. The timings all seem pretty good and I’ve never had a problem with them. Touch clunky to use but very helpful. ### 4/5 — A useful app *2025-09-13, version 3.99* I’ve been using the app for a few years now and it has been very useful. Two improvements I recommend: To be able to lock the film type, as it’s easy to change accidentally, and the ability to select more than one filter without having to return to the main display between each selection. ### 3/5 — Clever but text is way too tiny *2022-08-22, version 3.61* Seems like a useful app, but I may never really know. The text on screen is way too tiny to read. Does the designer intend for us to use a lupe?? ### 3/5 — Useful but many bugs *2022-06-26* This application is very helpful in the large format photography process. But there is still many bugs to be solved. And sometimes I can’t use it because of these bugs. ### 1/5 — Atualização ruim. *2022-05-02* Uso este APP já há algum tempo, pois faço macro em 8x10 usando extensões de fole de mais de 900mm com uma lente Zeiss Luminar de 40mm, e hoje o aplicativo não me deixar mais fazer a correção com estas extensões de fole com a lente pequena. Paguei, usei perfeitamente bem por um tempo e agora virou um app obsoleto pra mim. Perdi dinheiro depois destas atualizações… uma grande pena…. ### 1/5 — Wish I’d checked first… *2022-01-02, version 3.55* Bought this app because it was mentioned on a YouTube video. What a mistake. I use primarily Ilford film and the timings are way out. How can you sell and app and then not support it? I’m relieved I didn’t pay for the ‘pro’ version. ### 1/5 — Bait and Switch *2021-12-21, version 3.55* You pay $1.99 only to find out you need to upgrade for $9.99 to use all the features. ### 1/5 — Important films are missing *2021-12-08* Important films like Kodak Gold 200 or Cinestill 800T are missing. Some information why would be helpful ### 1/5 — Still gives incorrect data *2021-11-22, version 3.51* Months after previous reviews have pointed out the Ilford data is incorrect, unbelievably the app is still giving wrong results. Utter garbage. ### 2/5 — 有人能开发这个软件很好 *2021-10-10* 建议加入更常用的胶卷。另：同一个软件让我纠结付一次款就可以了，纠结两次是不行的。 ### 1/5 — Impossible to get the pro version installed on my phone *2021-09-08* It used to be a very nice and efficient application but this new version is a complete disaster. I bought the pro version, impossible to get it installed on my iPhone (6S). I can get it working on my Ipad though but it?s far from being convenient as I do not want to carry it out on the field, I have enough weight to haul around with my viewcamera. So it would be nice if we can use an app we paid for. PS: Ipad and Iphone are both up to date regarding their OS ### 1/5 — Good idea.. bad implementation *2021-07-09, version 3.12* Have you guys actually used this app? Or did you just chuck it onto the App Store without even testing it?? Because that’s what it seems like for sure. I have yet to use a feature that doesn’t have bugs; if it even works at all. Did you notice the keyboard won’t minimize unless you have a particular text box in focus? Or that you have to select each film holder you create as you add them else the entire list will peace out into another dimension when you do select one? I could go on for an hour but I’m not your beta tester.. I’m unfortunately your customer. You need to take a serious look at your process. ### 1/5 — Pro Version erforderlich *2021-07-02* Die App (Bilder im App Store) suggeriert leider, dass man alle möglichen Sachen einstellen kann. Die gibt es aber nur durch Upgrade zur Pro Version für zusätzlich schlappe 11 EUR. Ansonsten rechnet Dir die App nur die Reciprocity Werte für eine begrenzte Anzahl von Filmtypen aus. Daher werde ich die App zurückgeben. Das kann ich auch selbst. ### 1/5 — 先收12块…再收68块专业版…这很毒 *2021-06-29* 先收12块…再收68块专业版…这很毒 ### 4/5 — Useful app *2021-06-01, version 3.12* I’ve been using Reciprocity Timer for a few years now and it’s been very useful. There are a couple of modifications that would help; the ability to add more than one filter before returning to the main screen; I’d like to be able to ‘lock’ the selected film type, as I’ve inadvertently changed it a couple of times during a shoot without realizing. ## Most critical reviews (10 lowest-rated) ### 1/5 — Bugs everywhere *2026-08-15, version 3.99* Unfortunately the bugs didn’t appear until I paid for the app to access the customizable settings. The keyboard stays on screen. The UI elements overlap. It’s a mess. ### 1/5 — Not enough films listed *2025-08-06, version 3.99* Not much choice of film stocks listed. I was hoping ultramax 400 would be in here. ### 1/5 — 1/125 档加一档曝光，显示 1/80 *2025-08-02* 这种算是错误吗 ### 1/5 — Issue with Reciprocity Timer *2024-09-17* I would like to report an issue with Reciprocity Timer App. After the update to version 3.9 the app keeps crashing and closing on my iPhone (14 Pro Max, ISO 17.6.1). I use Reciprocity Timer to record my photo data, and it is very useful. I hope this issue is resolved as soon as possible. ### 1/5 — Issue with V3.9 *2024-09-15* Hello. I would like to report an issue with Reciprocity Timer App. After the update to version 3.8, the app keeps crashing and closing on my iPhone (14 Pro Max, ISO 17.6.1). I use Reciprocity Timer to record my photo data, and it is very useful. I hope this issue is resolved as soon as possible. Thank you. ### 1/5 — Timer only *2024-06-26, version 3.8* Won’t calculate anything. ### 1/5 — Not very good *2024-05-04, version 3.8* Not many film stocks. Just pushes you to pay more for a ‘pro’ version. Can’t get your money back. Avoid. ### 1/5 — Very poorly designed app *2024-02-17, version 3.8* Paid $1.99 for an app that doesn’t allow one to change most of the settings and while the instructions state that an upgrade to the pro version can be purchased within the app, I’m unable to find a link/button within the app to do so. Paying for apps is something i am happy to do, knowing that it normally supports better products, but either charge the full price up front, for a fully working app or make certain that the upgrade link is available within the app as mentioned in the manual. ### 1/5 — 没有电影卷 *2023-12-10* 没有常用电影卷 ### 1/5 — Waste of money *2023-09-22, version 3.61* Just Paid £1.99 and doesn’t have Cinestil 800T could tell us what film choices you get, to upgrade to “pro” is £9.99 😳 ## Most praised reviews (10 highest-rated) ### 5/5 — The missing app for film obsessives. *2026-03-27, version 3.99* I have a technical training in photography in the days of film, which meant a lot of maths, physics and chemistry. The hardest part was long exposures on film at night. Each film having its own issues after 1 second. This app solves that add adds in heaps of the other factors that affect the maths. All done for you! so good. The improvement I would like is the addition of FP4 (not sure why that is missed) and Lucky 100 and 400. ### 5/5 — Only thing like it *2026-01-09, version 3.99* Its a little ugly but gets the job done :) ### 5/5 — 非常有用的软件 *2025-10-08* 非常好用，特别对于大画幅摄影，参数比较齐，功能也很多。能考虑的都考虑了。 ### 5/5 — Has changed the game for me *2023-04-14, version 3.61* As all of my lenses have speeds that are NOT true to their stated times, that had cause many years of frustration in attempts to get good exposures. I had purchased a shutter speed timer, and hand written the speed averages for each, but attempting to then mentally calculate exposure reciprocity? It was a nightmare. Then I hear of “Reciprocity Timer”. Now with the App enhancement of being able to enter my own shutter speeds, I have consistently taken good exposure photos time and time again. ### 5/5 — Was good, not so much now *2021-12-05, version 3.55* Keeps crashing or deleting custom settings. Tried contacting developer and got no response. UPDATE: app is working great now after a conversation with the developer. Sent him screen recordings and data to help him figure it out. App update was done in a few hours, approved by Apple and downloaded to my phone a couple hours later. It’s already helped me. Cheers. ### 5/5 — Easy to use but lots of options *2020-04-12* Reciprocity timer is dead easy to use - but has lots of configurable options should you need it. Customize filter factors - no problem; bellows - all the way to 1200mm; make notes, custom films. ### 5/5 — Great *2019-07-09, version 2.54* Not sure why this app doesn’t have more good reviews. Best app ever for anybody using film. ### 5/5 — Great app, handy for 4x5 shooters *2019-03-03, version 2.54* Not enough credit is given for this app. This app is incredibly handy for calculating bellows compensation and reciprocity. Yes, this app could use more films in the database, but as a 4x5 shooter, all of the emulsions I need are listed. ### 5/5 — 필름 장노출용입니다 *2016-11-13* 괜찮네요 가격도 저렴하고 ### 5/5 — Great job ! *2016-06-21* In my top 5 app. Very well made. Super boulot ! --- *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 2026-08-25.*