# VST CoffeeTools for iPhone — user reviews > 36 indexed App Store user reviews of VST CoffeeTools for iPhone by VST, rated 2.30/5 from 15 ratings. - Source: https://appshunter.io/ios/app/vst-coffeetools-for-iphone/id351660247/reviews - App overview in markdown: https://appshunter.io/ios/app/vst-coffeetools-for-iphone/id351660247.md - Rating breakdown: 5★ 2 · 4★ 2 · 3★ 2 · 2★ 1 · 1★ 8 ## Newest reviews (10 of 36) ### 3/5 — Oh please kind sir, *2022-10-22* you have put so much in to this, could you find the heart to UPDAT? Now crashing on entry with iOS 15 on iPhone 13. 3 stars because I still have hope!😁 ### 4/5 — A Useful Tweak *2020-05-14* One way in which VST could improve the app for some, while allowing a greater use, and being an industry leader once again, would be to allow for a hundredth place in the dosing. There are more scientific scales like the OHAUS SCOUT or the U.S. SOLID 5000g/0.01g being seen in the industry as coffee is increasingly looked to as a science. With doses as small as 12g in pour overs and espresso, the difference of a tenth of a gram is nearly a percent of the mass. The difference between tenths of a gram in an extraction yield percentage reading is also considerable at around a quarter of a percent. Of course most people brewing coffee are not currently using a scale with readings to the hundredth of a gram, but if the app allowed for such, there would almost certainly be an eventual increase in the amount of people who found it a useful tweak. After all, there are more brewers now who are aiming for previously unattainable levels of accuracy in their brewing and charting methods. ### 2/5 — Update for iOS 11 please... wont even open now *2017-09-29* Please update, thanks. **Developer response:** The iOS 11 update is now available. ### 4/5 — Please update to ios 11. *2017-09-20, version 1.3* Please update to ios 11. ### 5/5 — a very useful app . . . *2013-02-12* and continually upgraded to be as accurate AND easy to use as possible. Every specialty coffee shop/roaster should be on the same page as VST. ### 1/5 — Can't even start it. *2012-10-10, version 1.2.1* Crashes immediately. Sure, the 1st iPhone is old, but it's supported, so it should work!? ### 5/5 — Works great, but *2012-03-15* UPDATED BELOW: The app has a slick interface and works great. I didn't even mind the charge for the module since I paid over $300+ for a refractometer. What irks me is having to shell out another $30 for to use it with my iPhone. The app is really just an iPhone app. While it will run on the iPad, it will not rotate. If I had know that fact I would have purchased the module for my iPhone instead. It will not allow one purchase to run on both machines... so I will be out $60 bucks if I want it on my iPhone. If it wasn't for that fact I would have given it five stars. UPDATE: It just appears that you have to purchase the module twice. If you go ahead and select purchase, the app store states that you already purchased the module (app store logic flaw). Works great and fun to use. ### 5/5 — the proof is in the app! *2011-11-14* I've used this app for over a year and it's solid - worth the $30 for the coffee mode - for any industry professional! Support from VST is quick and very helpful. ### 1/5 — Interesting but Flawed Info *2011-04-17* This appeared to be a very interesting app. Once I downloaded it I found it only had water as a liquid to monitor. When I looked into other liquids (e.g. Coffee) I found them to be much more expensive than "free". Including coffee, for example, was $30! It's not like I was cheated (I downloaded a free app after all) but they could have mentioned the prices of the various liquids/drinks in their ad. ### 5/5 — Revolutionary!! *2010-08-27, version 0* I'll begin by saying that this is useless without a refractometer (and they're expensive). This has been the most useful thing I have come across in my nine years as a barista/cafe owner. It has made me look at coffee and espresso brewing in a completely new direction. It is helping me to re-calibrate my palate and better associate particular flavours with where the brew is on a chart. It won't tell you how to brew better coffee (how boring owoud that be?!) but it gives you so much information and engenders a better understanding of coffee and espresso extraction. Invaluable! ## Most critical reviews (10 lowest-rated) ### 1/5 — Seriously? *2021-11-15* 50$ for easy math calculations with ugly interface ### 1/5 — Trash app *2021-09-20* Trash ### 1/5 — Just plain broken *2021-03-11* Happy to pay money for something that works. Unfortunately this app for coffee extraction doesn’t. The back end calculation is simply off. My TDS is 1.15, my dose is 37.5 and my end brew weight is 514. Using a calculator you arrive at about 15.75% extraction, but the “tool” says 16.4%. This will make you a worse brewer. Also, you’re forced to set a LRR, instead of having this being a deliverable. You can’t adjust the water weight and the end beverage weight independently. These numbers are locked. Another flaw. ### 1/5 — Rubbish *2020-05-12, version 1.4.1* This used to be useful but it has been stripped of function, which has put me off buying anything from this company. ### 1/5 — Just a sales tool *2019-11-23* This app does very little beyond allowing you to buy plug-ins that cost significant money. ### 1/5 — Wprthless 2.0 *2016-11-21* You cna get all this info on-line just google it. App is useless. ### 1/5 — VST b0rked their app: restore gives coffee mode lite, no front end UI ADJUSTMENT for tds. *2016-01-24, version 1.3* We're supposed to pay again to access coffee tds mode? ### 1/5 — No legacy support for previous coffee mode purchasers... *2016-01-24, version 1.3* I bought this app when it first debuted. I went to install on a Six+ and guess what, I need to buy it again? I think naught. ### 1/5 — The price for the pro-version must be a joke *2016-01-23, version 1.3* I bought both in-app-purchases for 20€ each, so I paid 40€ in total sum. Now they published the pro version and I would have to pay 49€ extra for the additional graph. I would prefer an in-app-option or a special price for old customers. ### 1/5 — Worthless: description is false *2014-02-02* This app only includes 'water mode'. If you want any of the other 'modes' (including coffee mode), you'll need to pony up another $30.00. ## Most praised reviews (10 highest-rated) ### 5/5 — I want to download again *2020-03-07, version 1.4.1* I used to pay. but it can’t be used my pay number. MLB44Z53HN ### 5/5 — My IPhone icon looks OK *2019-06-29, version 1.4.1* However My IPAD icons looks not ok. There’s no coffee cherry, But only circles and squares. ### 5/5 — Liquid Retained Ratio *2018-01-22* Coffee mode LRR. Why it cannot be set to zero? I think it could be set to zero. ### 5/5 — Fantastic! *2017-10-04* Convenient and simple to use! ### 5/5 — pro也买了 相比之下这个完全够用 *2017-08-21* 除了广告比较闹心之外 对于一个算数残疾人 这个很好的做到了可视化与数值计算 在tds仪的协助下可以直观的显示萃取数据 对于金杯 barista课程都是比较好的辅助 参数永远是辅助的 ### 5/5 — 好用。。。。 *2015-07-01* 好用。。。。 ### 5/5 — Essential for any coffee pro! *2014-02-04, version 1.3* The best tool on the iPhone for coffee professionals. Period. ### 5/5 — 팀 윈들보의 어플 *2013-11-20, version 1.2.2* 이라고 하네요.. ### 5/5 — good *2013-09-23* goog！ ### 5/5 — If it's good enough for the reigning national barista champion... *2013-04-02, version 1.2.2* Google "Man vs Volumetric" to understand why this app is priceless. Matt continues to stride out in front while the rest of us play catch up. --- *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 2026-09-01.*