We analyzed 19 negative reviews from the top 5 Arduino apps on the App Store. Here's what users hate most.
Ranked by frequency — how often each complaint appears in negative reviews.
37% of negative reviews mention this issue.
"They are trying to push for monthly/yearly subscriptions. You can't even use a lot of the widgets without upgrading."
"The app is nice. It's clean, simple, and easy to use. But a monthly subscription? C'mon. Then it's absolutely forced on the users to upgrade or be limited to all of what? Like 3 buttons?"
26% of negative reviews mention this issue.
"Why would you cancel the previous app with the qr code detection feature!! Lots of useful apps found published online are useless now and cannot be copied!!"
"I made a neat project with the old Blynk app, and was able to share access to the project with my whole family through the QR code feature."
21% of negative reviews mention this issue.
"Tried 2.0 again. Can't even make it though a single device setup. The old Blynk worked always. It refuses to connect to cloud server on port 80 or 8080."
"I tried like a hudred times, it doesn't work at all on esp8266 for making a wifi car."
16% of negative reviews mention this issue.
"I just installed this and quickly found it knows nothing about an UNO WiFi R3, instead asking me which shield I have. I faked it, got the sample code from the website, and got compiler errors, can't find PinStatus."
"Can you have a complete hello world type tutorial on both or three sides hardware parts, host and phone"
11% of negative reviews mention this issue.
"Doesn't show pricing unless you search the web. Free explorer account with 3 buttons. $6.99 a month maker account with 10 buttons. $99 a month for anything more."
"After seeing most widgets showed they required the Pro level I thought I would try the Maker level subscription hoping they would be enabled but still have a lower user limit. But sad"
11% of negative reviews mention this issue.
"App is really hard to use"
"If you are just getting started with iot projects. This app is not for you. You will just spend you time in frustration."
Design and usability issues driving negative reviews.
Users encounter paywalls immediately, even for simple single-device projects with basic controls
"If you are just getting started with iot projects. This app is not for you. You will just spend you time in frustration. It is clear that blynk wants to eliminate the hobbyist."
Existing projects became incompatible when forced to upgrade from old Blynk to Blynk 2.0
"I made a neat project with the old Blynk app, and was able to share access to the project with my whole family through the QR code feature. The app was somewhat limited, but I was happy with it. I expected the new app to be pretty much the same, but"
Connection issues and compiler errors with vague troubleshooting guidance
"It refuses to connect to cloud server on port 80 or 8080. The help on that subject is terrible. Says to call your ISP."
Get the complete Arduino market intelligence report — including missing features, pricing insights, build recommendations, and competitor weaknesses.
View Full Report — $9.9930-day money-back guarantee