# ServiceMax Zinc — user reviews > 116 indexed App Store user reviews of ServiceMax Zinc by ServiceMax, Inc., rated 3.80/5 from 30 ratings. - Source: https://appshunter.io/ios/app/servicemax-zinc/id655258963/reviews - App overview in markdown: https://appshunter.io/ios/app/servicemax-zinc/id655258963.md - Rating breakdown: 5★ 18 · 4★ 1 · 3★ 4 · 2★ 2 · 1★ 5 ## What do users think of ServiceMax Zinc? Overall sentiment: mixed **Pros** - 👍 Easy to use and intuitive interface - 🚀 Fast and efficient team communication - 💼 Great for business and workplace collaboration - 🔒 Secure messaging without sharing personal phone numbers - 📱 Cross-platform synchronization (phone, tablet, desktop) - 📁 File and document sharing capabilities - 📞 Video calling and voice features - 👥 Simple group messaging without clutter - ⚡ Reduces email overload - 🎯 Compartmentalizes work and personal communication **Cons** - 🐛 Frequent app crashes and freezing - 🔄 Constant logging out issues - ⌨️ Keyboard and typing problems - 📲 Unreliable notification delivery - 🖼️ Photo upload difficulties (especially on iPhone) - 📞 Poor call reliability and success rate - ⏱️ Slow performance and lag - 🔔 Persistent false notification badges - 🔄 Sync issues and endless loading screens - 📱 Limited iPad compatibility - 🎨 Incorrect sender names displayed in messages - ❌ Missing message previews in notifications **Commonly reported bugs** - App freezes when typing - Messages don't display on screen while typing - Persistent unread message badge (showing 3 unread when none exist) - Endless loop when receiving photos - Sync screen stuck indefinitely - Keyboard functionality broken after updates - Search feature not working - App crashes on latest update - Random logout without warning - Notifications stop working (requires reinstall) - Slow message delivery with incorrect sender attribution - Missing notification previews despite settings enabled - Search box inaccessible on recents tab **Most requested features** - Message search functionality - Ability to delete sent messages - Custom Do Not Disturb scheduling options - Emoji support in desktop version - Screen rotation support for landscape mode - Third-party keyboard support - Mac desktop standalone application - Message deletion and conversation archiving - CRM integration capabilities - Ability for contractors/external users to join groups ## Newest reviews (13 of 116) ### 2/5 — Need updates *2025-10-08, version 12.3.0* After the update it got horrible, Can’t type it freezing and every time have to shut the app and open And when typing doesn’t show on screen. ### 3/5 — Bugs *2023-11-29, version 7.0.1* It works fine for the most part, but needs some repair. It constantly shows me as having 3 unread messages when I have 0. I cannot get the little red notif to go away. Please fix this. ### 4/5 — Third party keyboard support *2023-07-04, version 5.27.2* Is the third party keyboard restricted on this app? Why? ### 3/5 — Does not reliably send notifications *2021-03-27, version 5.21.5* I have to delete and reinstall this app at least once a week because it stops sending me notifications. Unreliable. ### 2/5 — Needs improvements *2020-08-29, version 5.20.2* This app is a hit and miss. Always crashing and it lately it’s been logging me out every single day. ### 2/5 — Slow, no message preview *2019-08-04, version 5.14* We have a group chat on Zinc. But it is extremely slow and often shows the wrong name against someone’s message. Yu get a notification, look at the app, and there will be nothing. 15 seconds later the message will show. Sometimes with the correct sender, sometimes not. Also won’t show a preview of the message in notification banner or lock screen despite having this setting turned on. ### 3/5 — Add custom Do Not Disturb options *2018-10-29, version 5.6.3* I miss so many Sunday meetings as my company is around the clock. Please update the Do Not Disturb option to add the ability to set your own time for when Do Not Disturb ends. (Instead of just Monday at 8) ### 3/5 — We’ll see this plays out I’ll start with 5. Good luck 😑 *2018-04-03, version 5.2.2* I plan on developing VR MMOs someday, I use my iPads when im out an about since I don’t want to lug around my 50pound desktop (actually I do, but people would probably question my sanity). I have hopes this will be very useful to me when I find or build a team to work with. ### 5/5 — CoTapin *2016-03-31, version 3.3.3* CoTap has been great! It allows me to stay in touch with my teams in the field and has helped us become closer as a team!! ### 5/5 — Best thing since email...and better in many ways! *2016-03-31, version 3.3.3* This app has been a big help to our team's productivity. Lot's of helpful improvements on the way. ### 5/5 — Rocking App *2016-03-30, version 3.3.3* Excellent ### 5/5 — Rich in features, stable and secure *2016-03-29, version 3.3.3* This app doesn't get the recognition it deserves. It's built from the ground up to be a mobile first product for teams that are on the move and not chained to a desk. Well done! ### 5/5 — Great mobile app *2016-03-03, version 3.3.2* It's a great app for replacing GroupMe. Our whole team has switched on to it ## Most critical reviews (10 lowest-rated) ### 1/5 — Worst chat app *2023-11-27, version 7.0.1* I’ve been forced to use this for work and it has ruined many work days To upload photos from iPhone is excruciating ### 1/5 — How can you be this bad at producing an app? *2023-10-21, version 7.0.1* On this failed Zinc update- sitting at the sync screen forever with no progress. It's always something that gets broken. Last update was the keyboard, or trying to search for people, now it's entirely broken. ### 1/5 — Terrible app *2021-12-06, version 5.24* App constantly crashing and logs you out randomly ### 1/5 — How did this make it out of Alpha testing??? *2021-06-23, version 5.22.1* Fortunately the WEB app works much better than the IOS app. If a picture is received the app will often go into and endless loop whereby one touches “Done” and the picture reappears and renders the chat session useless unless another message is received. Making calls is a nightmare, the success ratio is about 20% with most of most users resorting to FaceTime audio. ### 1/5 — My app?!?! *2020-12-30, version 5.21.1* Why did u sign me out of my app then tell me that my free trial is over????? I’ve had this app on my phone for a long time and I need it for work!!! This is how I communicate with my nurses and coworkers for my patients!!!!! ### 1/5 — App just crashes now *2020-03-13, version 5.16.1* Lasted update just crashes can’t open. ### 1/5 — One of the least reliable messaging apps of this decade *2017-12-07, version 5.0.4* A constantly changing brand isn't enough to erase the stink of CoTap/Zinc from my phone ### 1/5 — Spam warning *2015-09-28, version 3.1.0* Stay away from this crap. ### 1/5 — Questionable Practice. Avoid! *2015-09-08, version 3.0.0* Cotap spammed me with the false/misleading message "you have been added as a contact on Cotap". In fact nobody has added me, it's just Cotap adding a bunch of emails from my organisation which they obtained by questionable mean. You want to trust a company like this with your business messages? Be my guest. ### 1/5 — Miss guid to plumber *2015-02-21, version 2.3.0* I don't like this app, worst decision to download, caused my phone to constantly freeze. Just a rip off from whats app. DO NOT RECOMMEND ## Most praised reviews (10 highest-rated) ### 5/5 — Great app! *2020-06-30, version 5.19.1* We are using it in our workplace and it’s great. It would be nice to have the app for Mac desktop. ### 5/5 — Awesome app! *2017-11-09, version 5.0.3* I use it every day, it’s fast, easy to use and reliable. I do calls, share files and chat with my team everyday, it helps me do my work every day! ### 5/5 — Everyday efficient communication *2017-11-07, version 5.0.3* Use Zinc everyday to commute and share files. Love how easy is to get things done and reach all my teammates. Video calls are sharp and instant. Group messages keep things going. ### 5/5 — Rely on it everyday *2017-10-28, version 5.0.1* All of my work communications happen in Zinc. It’s a great app that constantly gets better and better. No matter who I need to talk to, they are just a click away. I don’t need anyone’s phone number and whenever we work with contractors they can be instantly added to our conversations using their email address. Couldn't imagine working without it! ### 5/5 — Well designed and useful *2016-10-04, version 3.5.4* Must have app for modern businesses. Easy to use messaging interface to interact with everyone at work securely. Clean and simple interface. ### 5/5 — Good app! *2016-07-07, version 3.5.2* Video calls get better with each release. ### 5/5 — Rockstar app for Business *2016-06-08, version 3.5.1* Great for keeping in contact with your teams. Keep the updates coming! ### 5/5 — Game changing!! *2016-06-04, version 3.4.1* With CoTap we stay in touch, our entire staff. No more wondering if you missed something. If it hasn't been tapped it probably didn't happen ### 5/5 — Coral *2016-04-04, version 3.4.0* Great app, easy to use. ### 5/5 — Works great! *2016-03-31, version 3.3.3* I love the new features! --- *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 2026-09-09.*