# Max Zs Values — user reviews > 29 indexed App Store user reviews of Max Zs Values by Pro Certs Software Ltd. - Source: https://appshunter.io/ios/app/max-zs-values/id498838137/reviews - App overview in markdown: https://appshunter.io/ios/app/max-zs-values/id498838137.md ## Newest reviews (9 of 29) ### 4/5 — Insightful *2021-08-18, version 3.1.6* No, not Mccb’s but type 4 3871. Seeing that you had the Mccb’s gave me hope for the 3871’s Other than that it’s a great app. Bad mood, sorry for the gut reaction. ### 4/5 — Great app but... *2020-12-02, version 3.1.3* Love this app very handy when needing to remember figures,values etc. However since iOS 14 sadly does no longer display correctly on my iPhone xs which deems some of the functions unusable atm - hopefully a fix for this is in the pipeline?. ### 4/5 — Mr C Davie *2020-04-22, version 3.1.2* Great App saves a lot of time highly recommendable App part of my tool kit ### 3/5 — Good app values not amendment 3 *2015-05-06, version 1.5* Good app but doesn't appear to update as the values are not as amendment 3 in the yellow book. ### 4/5 — Gaz Hanlon *2013-01-08, version 1.5* Works well and very useful at times ### 1/5 — iOS 6 non compatible *2012-09-24, version 1.3* The app no longer works with iOS 6 ### 1/5 — DOESNT WORK! *2012-07-19, version 1.3* App does load up zs values once u enter app! Did work one when had it and was decent but now I need it,it doesn't! ### 5/5 — Brilliant !! *2012-04-19, version 1.1* A first class app, the best one of this type, and i have tried them all. Great communication from the devs, they are going to add some manufacturer specific devices for me too in a free update. ### 5/5 — Wow *2012-02-12, version 1.0* I have the whole Pro-Certs range of iPhone software. If they keep producing quality items like this I can throw away my onsite guide! Keep up the good work!! ( can wait to see if you can make software to bill my customers as well!! Lol) ## Most critical reviews (10 lowest-rated) ### 1/5 — Unhappy long standing customer *2023-07-11, version 3.1.12* Really unhappy that I have purchased this app previously at nearly £10 - had it for years, used it often. Purchased a new phone and I’ve had to repurchase it. Even though I’ve used the same email address to repurchase. I feel like that is unfair. ### 1/5 — Rip off *2023-06-14, version 3.1.12* Really poor app ### 1/5 — Pointless *2020-04-03, version 3.1.1* Downloaded for values on a BSEN 60947-2 MCCB and it just comes up with check manufacturers specifications..!! So waste of money. ### 1/5 — Pants! *2013-07-09, version 1.5* App keeps freezing. Waste of cash ### 1/5 — Would be a great app if it worked *2012-12-27, version 1.5* Crashes most of the time , just brought and could not open for hours, once loaded wouldn't load any details I asked for. I'm a sparky and would love this app to work! ### 1/5 — Crap ! *2012-10-25, version 1.4* Really don't work ### 1/5 — Update please! *2012-10-08, version 1.4* Worked ok on ios5. Not on ios6. Rubbish! ### 1/5 — Comparability *2012-10-04, version 1.4* Does not work on iOS 6 even with update ### 1/5 — Doesn't work *2012-10-03, version 1.4* Doesn't work on iOS 6. Have tried reinstalling it several times but no joy. Would have been handy if it did. ### 1/5 — Waste of time *2012-09-26, version 1.3* Hardly worked on iOS 5 and doesn't work at all on iOS 6. ## Most praised reviews (10 highest-rated) ### 5/5 — Essential for commissioning. *2023-04-19, version 3.1.12* I have had this app for a few years and the update is amazing!!!! Everything is always up to date, easy to use l. has many variety of MCB, fuses and MCCBs values available. Well done to whoever made it. ### 5/5 — Cert Time Saver *2021-07-15, version 3.1.6* Brilliant app. Saves valuable time when fillling out certs especially for MCCB max zs. Awesome. ### 5/5 — Give it a go *2021-07-07, version 3.1.6* I couldn’t find a Zs reading for a breaker so I brought this app and I’m very impressed by it. Will be very handy on site for doing periodic’s ### 5/5 — Review *2021-06-15, version 3.1.6* Excellent app and easy to use ### 5/5 — Excellent *2021-01-20, version 3.1.4* I downloaded this app last year and it was great very handy, There was an issue with the software but the developers was extremely helpful and went out of their way to fix this issue, I’ve recently downloaded the updated version and can honestly say it’s gold excellent stuff ### 5/5 — Electrician *2020-10-23, version 3.1.3* Constantly improving and adding more information to the app ### 5/5 — Handy pocket guide *2020-09-02, version 3.1.2* Great app!!! I have been using this app for a few years now and I can not fault it, it’s easy and convenient to use and rather than having to overthink and take you away from the everyday job it saves time. ### 5/5 — Very handy *2020-05-28, version 3.1.2* All your applications are very useful, quick to operate. Keep up the great work Thanks ### 5/5 — Very handy *2018-06-28, version 2.1* Works well for me. ### 5/5 — Thanks for update, now works great. *2012-11-05, version 1.5* Now works great on ios 6, thanks for the update. --- *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.*