Verithiathe honest score on any app
Updated July 2026 · real, multi-region App Store reviews
Head-to-head

Kemo Pro vs Calculator₊

Kemo Pro 4.6★ · Free + IAP 65
Winner Kemo Pro
Calculator₊ 4.7★ · Free + IAP 40

Kemo Pro is a better choice for those seeking an affordable smart camera system, despite its reliability and customer service issues, while Calculator₊ faces significant user backlash for its aggressive subscription model and ads.

Full reviews: Kemo Pro · Calculator₊

Kemo Pro offers an affordable smart camera solution with good video quality, though users frequently report issues with connectivity, inconsistent recording, and poor customer support. Calculator₊, while praised for its basic functionality and interface, is widely criticized for its intrusive ads and high-cost subscription model for a calculator app.

Head to head

Features & Functionality tieR1R2R5R8
Kemo Pro Kemo Pro users appreciate features like clear video, picture quality, and alarm functions for home and business security R2R8. However, many report issues with cameras not working, becoming blurry, or going offline R1R11R19. There are also complaints about short recording times (10 seconds) and motion detection inconsistencies R5.
Calculator₊ Calculator₊ is praised for its basic calculation capabilities, large fonts, and ease of use . Some users highlight advanced features like photo math problem uploads . However, there are reports of bugs, such as division results displaying incorrectly, lag when used as a widget, and a low limit for high number powers . A significant number of users also lament the removal of keyboard support and the absence of a 'constant' function .
Ease of Use tieR2R6R7R19
Kemo Pro Many Kemo Pro users find the initial setup simple and the app easy to use R2R32. However, frequent issues like cameras going offline, settings changing automatically, and the app randomly logging out create frustration R6R7R19. Some also experience delays in camera footage loading .
Calculator₊ Calculator₊ is generally considered easy to use for basic calculations . However, users report significant frustration with intrusive ads and deceptive payment screens that hinder usability R63R64R66R75. Some also mention the app being laggy or crashing .
Reliability tieR1R6R7R10
Kemo Pro Kemo Pro's reliability is a major concern, with numerous reports of cameras not working, going offline, or having inconsistent recording R1R6R7R10. Users also mention short battery life and issues with batteries not lasting or recharging .
Calculator₊ Calculator₊ generally performs calculations reliably . However, some users report bugs like incorrect division results, lagging when used as a widget, and crashes .
Price/Value edge: Kemo ProR3R4R13R32
Kemo Pro Kemo Pro is often praised for being a good value for the price, with some users stating it's cheap and satisfies their needs R3R32. However, a significant number of recent reviews express frustration over the app transitioning from free to a paid subscription model, with charges for features that were previously free R4R13R34. The subscription cost is mentioned as $30 for a year R13R46.
Calculator₊ Calculator₊ faces overwhelming criticism for its pricing model. Users are outraged by the requirement to pay a recurring subscription for a basic calculator, with prices mentioned as $5.99, $6 a month, or $60 a year R61R73R82. Many feel it's not worth the cost, especially when free alternatives exist or the built-in phone calculator is sufficient R73R82. There are also complaints about deceptive payment screens and being charged despite cancelling trials R64.
Customer Support edge: Kemo ProR10R13R14R16
Kemo Pro Kemo Pro users report consistently poor customer service. Complaints include unhelpful responses, lies, unactivated subscriptions, lack of refunds, and difficulty reaching live representatives R10R13R14R16. Some users mention waiting months for help or receiving no response at all R14R16.
Calculator₊ Reviews for Calculator₊ do not frequently mention customer support interactions, but one user reported an issue with not being able to download and use a previously paid version on a new phone . Another mentioned being charged monthly despite the app saying they didn't order it .
Pick Kemo Pro if

You are looking for an affordable smart camera system and are willing to tolerate potential issues with connectivity, inconsistent recording, and poor customer support R3R32. You prioritize basic security features like clear video and alarms over perfect reliability R2.

Pick Calculator₊ if

You need a basic, easy-to-use calculator with large fonts and are prepared to navigate or pay to avoid numerous ads and a subscription model .

Evidence note: The evidence for Kemo Pro is extensive and covers all dimensions, with a clear trend of declining satisfaction due to subscription changes and reliability issues. For Calculator₊, the evidence is heavily skewed towards negative feedback regarding its pricing and ads, with fewer detailed comments on core functionality beyond basic satisfaction.

Frequently asked

Does Kemo Pro require a subscription?
Yes, Kemo Pro now requires a subscription for many features that were previously free, with users reporting charges of around $30 per year, which has led to significant user frustration R4R13R34R46.
Are there many ads in Calculator₊?
Yes, Calculator₊ has a significant number of ads, which many users find intrusive, annoying, and disruptive to the app's functionality, often leading to accidental clicks R63R64R66R75.
How much does Calculator₊ cost?
Calculator₊ offers a subscription model that users report costs around $5.99 per month or $60 per year, which is widely criticized as being excessively high for a calculator app R61R73R82R110.
What are common problems with Kemo Pro cameras?
Common problems with Kemo Pro cameras include cameras going offline frequently, inconsistent or delayed recording, blurry video quality, settings changing on their own, and short battery life R1R6R7R11.

What reviewers actually said

Built only from these 120 real reviews (foreign ones translated). Superscripts jump to the quote here. Apple has no per-review links, so [ref] opens that app's reviews on the App Store.

  1. [R1] Kemo Pro 1/5 · US Cameras: Several don’t work and have gotten weaker over time
  2. [R2] Kemo Pro 5/5 · US Very good product: I really enjoy my camera the set up was very simple clear video pictures love the alarm I love it so much I have my camera inside and outside big my home
  3. [R5] Kemo Pro 4/5 · US Survey: Service is weak a lot and it only records 10 sec of footage
  4. [R8] Kemo Pro 5/5 · US Protect: It is a great device for your business or home
  5. [R6] Kemo Pro 3/5 · US Constant Issues: I don’t know if EVERYONE has this problem but….. My Doorbell & Other Cameras seem to stop recording Motion On its own?? I have to check my camera settings often because it seems to change settings by itself?? I have NO IDEA how or why it does it!! I don’t believe that I have it on any settings that would cause it to change on its own…..
  6. [R7] Kemo Pro 1/5 · US Neutral: When it works, it works. But when it doesn’t, it really doesn’t.
  7. [R19] Kemo Pro 1/5 · US camera: front door camera says its offline and its hardwired and wont let me reset it
  8. [R10] Kemo Pro 1/5 · US Frustrating: My system is not working. I thought maybe my card was wrong but it’s fine. Please help
  9. [R3] Kemo Pro 3/5 · US Not Nad: The camera is pretty good for the price paid. It doesn’t always pick up everything or everyone but it does work
  10. [R4] Kemo Pro 1/5 · US Now Wanting Payment to Use: Is what I said. You by this Smart Door Bell and after years charges to use. If I new this up front NEVER WOULD HAVE PURCHASED
  11. [R13] Kemo Pro 1/5 · US THE WORST: I talked to customer service several times all they do is lie!!!! It’s been over a year now. They said they would send me a replacement for mines because it wouldn’t capture anything, and also even when I try speaking to someone on the camera no one can hear me. You even have to pay for a subscription. DO NOT BUY NOT WORTH IT $30 FOR A SUBSCRIPTION NO THANK YOU!
  12. [R32] Kemo Pro 5/5 · US Excelente: Práctica fácil de instalar y usar y muy barata, para mi muy buena opción
  13. [R14] Kemo Pro 5/5 · US Response time: I’ve had problems with my camera and membership and have gotten little help for months.
  14. [R16] Kemo Pro 1/5 · US Very unprofessional. They didn’t activate my subscription until November and I purchased it in June: Last year I purchased a subscription in June and I sent a screenshot to them showing that I purchased this subscription and I needed them to activate it. Nobody wrote me back until November and then they finally activated my subscription. I paid for one whole year, but they still cut off my subscr
  15. [R34] Kemo Pro 1/5 · US Horrible: I had this ring camera for over five years. It was another name prior so now that the name has changed the whole app has changed now you have to pay for a subscription to see what’s going on outside of your house and when I got this five years ago, it was no problem. Everything was free. And because I had it for over five years, I should be grandfathered in on any subscription so don’t g
  16. [R46] Kemo Pro 1/5 · US DON’T fall for the “free trial”: I clicked on the banner for the 3 day trial period and as I always do, went to immediately cancel it in my Apple subscriptions. Despite having cancelled directly after subscribing, I was billed for the entire year anyway. I am going to attempt to get ahold of customer service but from what I can tell, the odds are low that I will get this money back. I now am payin
  17. [R63] Calculator₊ 3/5 · US Don’t recommend: This calculator is not helpful because you have to pay for some stuff and there are ads VERY annoying 😤and I would have put 5 or 4 stars.
  18. [R64] Calculator₊ 1/5 · US Not Worth Your Time: Shouldn’t have to sift through a million pop ups for a calculator app just to be able to use it. The payment screen for the different memberships also seems intentionally deceiving in my opinion with their “continue for free” button leading you to checkout for their free trial + subscription and the continue without adds option barely visible in the upper corner. Do better. Un
  19. [R66] Calculator₊ 3/5 · US Works great, why do I need ads and other useless content?: Works great, why do I need ads and other useless content?
  20. [R75] Calculator₊ 3/5 · GB Too much adds around the screen but works: Lower down on the ads a bit because I accidentally always click them but it works fine just too much ads thank you
  21. [R61] Calculator₊ 1/5 · US For a Calculator?: Why would I ever pay a reoccurring subscription…even a penny…for a calculator. Get out of here with this $5.99. 🙄
  22. [R73] Calculator₊ 1/5 · US Seriously?: I accidentally tapped on something and it wants to charge me six dollars a month for a calculator? This thing does nothing that you can’t get free very easily.
  23. [R82] Calculator₊ 2/5 · US Not even remotely worth it.: $60/yr for a calculator with scant more features than Apple’s own calculator? No thanks. This app at most is worth a single purchase of about $2 and certainly NOT worthy of a subscription. The dev is probably relying on the fact that many people forget about their subscriptions so the dev can quietly pocket undeserved money. This isn’t what Steve Jobs had in mind w
  24. [R110] Calculator₊ 1/5 · US $3,120: That’s how much this calculator will cost you for the first 10 years. $6 a WEEK for a calculator?
  25. [R11] Kemo Pro 4/5 · US About cameras: I have enjoyed these cameras , but lately one is blurry and not give me good picture , how to fix this ? I’ve even tried to clean it . Still happens .

Synthesized from 120 recent App Store reviews · updated July 2026 · View on the App Store