Calzy Reviews

Calzy Reviews

Published by on 2026-05-03

🏷️ About: Make your day-to-day calculations quick, easy, and beautiful with Calzy. Whether you're a student, professional, or just looking for a better way to manage your everyday math, Calzy is the perfect solution.


       


Is Calzy Safe to Use?

We Investigate the app owner's website (Calzy.app), verify their legitimacy, and uncover hidden scams and complaints.


Overall Customer Experience 😎


🤬 Negative experience
66.7%

😎 Positive experience
33.3%

🫥 Neutral
0.0%

~ from Justuseapp.com NLP analysis of 1,867 combined software reviews.

Is Calzy Safe?
Calzy appears generally safe, but use with caution.
33.3/100

  Safety Analysis »»

Is Calzy Legit?
Calzy appears legitimate, though exercise caution.
33.3/100



Read 20 Customer Service Reviews 😠💢

4.7 out of 5
Deleting

Deleting app. Tired of having problems “dragging” values in memory and having to try over and over again because it’s not sensing me hold down on the value long enough to move it. These really should be available in “slots” where you can quickly press (without having to drag the value) to recall it. I also hate that every time I press an operation such as + - / x that my phone vibrates - maybe that’s a small thing, but it’s annoying, and I don’t see an option to turn it off. I found a different app that does not vibrate my phone and has memory slots that I can quickly press to recall values.

Nope, I hate it

I got suckered into paying $5 for this on my new Apple Watch thinking that Apple’s recommendation meant something. I tried the Watch app and was thinking maybe it would be good. Only to find out that Apple Watch has a better calculator built in.

That’s okay. Maybe it’s a good iPad calculator? I’ve been liking the Uno calculator, but this one supposedly has widget support. Nope. It’s a massively confused UX that’s unintuitive to use and requires a ton of settings customization to get to a semi-usable state.

What about the widget support? Apparently doesn’t work correctly in iOS 16. After struggling to figure out how, I eventually was able to add to the Today view. Except that the widget isn’t sized correctly and thus won’t show the keypad. And I can’t enter from the keyboard. Nor can I move its location above other widgets.

As much as I want to love Calzy and I’m positive the developer has put a ton of energy into it, this is very much not for me.

Meh

It seems like a really cool simple calculator. But after a couple minutes it becomes incredibly frustrating to use.

For example, after saving a number to the clipboard, I should be able to tap it to paste it back into the workstation. Instead I have to drag it into an operation. This is annoying if I want to use it as the first number of an expression. There are numerous other tiny quirks that make Calzy unsuitable for real world application.

Furthermore, the widget in the notification center has very low contrast, even when turning dark mode off. It's nearly unusable.

4-star app coupled with 0-star support

I purchased Calzy as part of a bundle with a couple of other apps by the same developer.
I have a family account with one additional family member and purchase sharing enabled. Calzy lists that it supports Family Sharing.

At the time of purchase, while my wife had an Apple ID/account, she did not have an iPhone and was waiting to get one. When she got her phone and tried to install Calzy (and one other app which was part of the same bundle), Calzy Store indicated that it needed to be purchased.
I contacted the developer of Calzy, to clarify if that should happen. No response. 

I then contacted Apple. They were also unable to figure out why that was the case, and suggested that I get back to the developer. So I sent him a second email. No response again!

Eventually, some more searching around yielded an answer and I was able to get Calzy installed. It's a decent app, but based on my (one-way) interaction with this dev, I cannot recommend it.

NOTE: I have put the same review for another app by this developer. I just wanted to put a similar review here in case someone is considering this. The bundle I had purchased had three apps, but there were two of them which I wanted to install on my wife's phone.

Great and all, truly. However…

this app isn’t a terrible app. If you’re looking for an iPad calculator app, I couldn’t give you a better answer than Calcsmos or this app, but this app has some annoying little tricks up its sleeve.

The history feature is the biggest boast. It’s good for those who like it, but if your in landscape mode on iPad, there isn’t any possible way to hide it without utilizing the multitasking functionality. Stage Manager wise, Calzy works fine. It does very much so! But, why does a free app like Calcsmos gave scientific buttons, no ads, and amazing stage manager support (w/ sci buttons) for free? Day to day calculations could involve square roots, exponents, or even a trigonometry function time to time, so why exclude?

Another thing, the weird animation that happens when the device changes orientation is super weird. Why does that show up? Presentation? Function? What and why?

Beautiful, great ideas, slow UX

I’ve only used Calzy for a little while but a few UX-relates things really jump out at me.

As many reviews have said, the lack of a dedicated clear-all button (and instead having to long-press the delete key) slows things down too much.

Dragging and dropping numbers to save them and use them is brilliant. But I want to be able to start dragging the number as soon as my finger touches it instead of having to wait about one second for my finger to “grab on“ to it.

When I bring up a Settings panel and it covers part of the screen and the other part is darkened, I want to be able to tap outside the panel, in the darkened area, to dismiss the panel.

In short I want to go fast and Calzy makes me go slow. I will stick with the built-in calculator for now but I would love to give Calzy another try if these issues are addressed.

Nice Calculator but Widget doesn’t work

I purchased this Calculator specifically for the widget so that I had quick access to simple calculations. I was hoping I could place it on my Lock Screen however that doesn’t seem to be an option. I currently have it on my Home Screen but most of the time when I click on a number it just opens up Calzy which is frustrating. I wish it would allow me to calculate without opening Calzy . Other than that it seems like a nice calculator with some cool customization.

Seems great but...

It lacks two necessary features that would enable it to be a truly productivity oriented app, as it should be. Here is what I mean:
1) there is no separate all clear button!
Fast inputs require this button to be separately available otherwise it can impede on productivity. I am comparing Calzy to the stock calculator app as well as a physical calculator and the importance can easily be noticed.
It is not to say that it is not there - it is combined with the regular delete function and the input can, too easily, be unregistered with a slight move of the finger whilst force pressing
2) most importantly it loads too slowly to be used frequently as my main calculator (for business use). I use an iPhone X and the quick launch feature of Apple’s own calculator bests the launch time of Calzy by miles. And in high pressure situations Calzy likely would not be preferred by most.

In other instances, using this calculator is a breeze, as long as it is already opened and you are not in a time crunch. The user interface is pleasing to the eye and the added features are on point.

Just add the two basics and this 4-Star app can easily be a 5-Star app

Good... But...

I really like Calzy , but there are a few things I wish..., We at least had some options to change such as:
on the side, having a running tape vertically especially on the iPad.
Also, I find it a bit distracting to have the main display performing an operation while I’m typing in a number… If that makes sense?
And lastly, I like having an all-clear button, but wish it were bigger and able to be moved down by the operators.
I now own all 3 apps, and want an amazing calculator .. especially on the iPad. There is plenty of room to condense and expand for tape and other features.

Great App! But All clear button needs to be moveable!

4 stars…Great app. Simple, precise, easy to see, great design. Haptic seems to work well, although the sound cannot keep up with these hands. Luckily, turning sound off and just using the haptics works. You can even bring it up in your iMessages and send calculations thru it.
It would be nice to have the all clear button, like every other button, available to move where you feel most comfortable. I still have not got used to it. For me, if that button gets to be customizable, its a 5 star app.

Works great now

Edit - everything including memory and saving works now. Also their team is very responsive.

I bought it for the memory purposes and being able to save various calculations. It was working for a while but now nothing shows up in history or bookmarks and I even tried reinstalling it but it still doesn’t work.

A stellar calculator with history and no subscription

I've been searching for the perfect calculator, and this is it. It doesn't have a monthly subscription (because why would anyone need to subscribe to a freaking calculator??), It has my calculation history (which can be labeled!), and it works on Apple watch. This is the best app on my phone, even if it's not the most used.

Nice but

Simple and elegant, load fast, integrate as a widget in ipad side screen is really cool and apple watch version is beautiful. But: 1. Scientific layout is hideous as one’s has to swipe to reach some functions, I wish it fits in the screen somehow. 2. The x root y function is missing. 3. The AC button is hidden in settings and when it’s activated it appears at the results screen instead of keys screen.

Calza 3 Calculator is Great for ColorBlind

This calculator is full of great features others do not have available. Plus it is very simple to use... especially for me a partially colorblind person!!! Many many apps are designed (without consideration for the extremely large number of colorblind males) using the most difficult colors for the average colorblind person to see. The this app 3 Calculator is a blessing for me as a Color Blind Person. Now if Companies like McDonalds and others who use LED Ordering Displays would only consider not using the hardest colors to design menu ordering displays! All APP Developers should consider the ColorBlind people who want to use their apps. Thank you for this Convenient Easy to See Calculator!

Great love this app

One of the best to use and looking calculator apps in Calzy Store. I was happy to purchase the 3 app bundle for $9.99 worth every penny. Thanks for the awesome apps. If you see bad reviews I promise they are lying. I have been using Calzy since the 1st version a few years ago or longer. I have bought it multiple times as well for multiple devices. Definitely worth buying

All around great Calc but…

Believe the hype this is the most useful calculator on iOS I’ve ever used, and worth every penny (so glad there’s no in-app purchase nonsense). I even went ahead and got the bundle with Lumy for a great deal. 5 stars for the fact that this Calc now means I don’t have to use my Ti-84 as much for complex calculations it’s a major win. Hope to see Apple add interactivity ability to the new widget platform so this app widget can be place anywhere on the Home Screen. But regardless big kudos to the developer! I love his story, so inspiring.

Beautiful [Apple] Calculator App *Scientific/Alternative/Backup*

this app is the only other Calculator app you'll ever need on your iPhone!

The UI is gorgeous, fully customizable, and has a short learning curve. The only other calculator app to check out and consider would be CALCBOT. It's also very cool, and offers a slightly different feature set, but is also very fun and functional.

It's just matter of preference I suppose.

I haven't had a reason to experience their customer support system, but if it's anything like the rest of Calzy , I'm sure it's good.

If you're looking to upgrade the default [Apple] Calculator app on your iPhone, look no further.
This is the one you want, even when directly compared to Calcbot, this app is still the #1 choice.

In summary, this app appears to be an excellent paid upgrade choice for a rudimentary default [Apple] iPhone app.

Definitely buy this one, you'll be pleased you did.

Nice app

Nice app. Please add a shortcut to add it on the control center (when you swipe down from the top right edge to open control center shortcuts) so Calzy is easily accessible and can fully replace the original calculator app. That’s where I always open the calculator. Imagine you’re in a app then you need to calculate so you go home, find this app to start calculating. with the shortcut in the control center you just swipe down and this app is always ready to be used. I purchased Calzy as it has more feature than the original one but I still use the original one as it is more accessible.

Amazing calculator

I deleted my stock calculator on my iPhone after using this. I love it. You use your calculator a lot more than you think you do, whether it be calculating a tip at a restaurant or calculating how much you will get paid you use your calculator almost every day and I grew tired of the limitations from the stock calculator especially that if I messed up a calculation I would have to start all over. With this one everything is editable. They say people only leave reviews if the absolutely love something or they absolutely hate it. So the fact that I am leaving this review goes to show how much I love and use this calculator. Awesome product.

Great calculator app! Advanced features are awesome!

Great calculator app. Way better than the default one or others out there I’ve seen and used!! Love the advanced options it has! I really like that you can see all the numbers you’ve typed as well as being able to edit the numbers without having to start over again. I use it probably everyday.



Is Calzy Safe? 🙏

Calzy appears generally safe, but use with caution. JustUseApp Safety Score for Calzy is 33.3/100.
This assessment is based on our NLP analysis of 1,867 user reviews. Combined with the app store average rating of 4.7/5.

Safety Analysis

86.5% of users say app is safe 👍
86.5%

8.1% of users have some concerns ⚠️
8.1%

5.3% of users say app is risky 🚨
5.3%


Is Calzy Legit? 💯

Calzy appears legitimate, though exercise caution. Our NLP models processed user feedback to estimate legitimacy. JustUseApp Legitimacy Score for Calzy is 33.3/100 .
This conclusion is based on analysis of 1,867 user reviews.

🔏 Privacy & Data Safety

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Features

Using the latest iOS technology, like Live Activity, Drag and Drop, Haptic Touch, Face ID, and more, Calzy makes mathematical problem-solving a seamless experience.

With its advanced features and gorgeous design, Calzy will quickly become your go-to calculator.

One of its standout features is the "Memory Area," where you can store and easily reuse multiple numerical values with just a drag and drop.

Whether you're a student, professional, or just looking for a better way to manage your everyday math, Calzy is the perfect solution.

Powered by the latest iOS technology, Calzy is the calculator for the new age.

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Raja V

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