# Resistor Calc+ vs Blynk IoT

The clearest difference is in-app purchases: Resistor Calc+ at none against Blynk IoT's 7. Resistor Calc+ also leads on rating (5.0 vs 4.5) and review sentiment (67% vs 42%). Blynk IoT's advantage is ads (none vs shown) and ratings volume (828 vs 5). On price there is nothing between them.

Both are free to download. Blynk IoT sells 7 in-app purchases, starting at $6.99 per month. Resistor Calc+ asks for nothing beyond the download.

Resistor Calc+ holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Blynk IoT has 828 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 67% of Resistor Calc+'s written reviews are positive against 42% of Blynk IoT's.

Resistor Calc+ ships an update every 2 months, Blynk IoT monthly. The most recent releases landed on October 7, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Resistor Calc+ | Blynk IoT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/resistor-calc-plus/id1441211200/reviews)** | [4.5 (828 ratings)](https://appshunter.io/ios/app/blynk-iot/id1559317868/reviews) |
| Number of ratings | 5 | **828** |
| Positive reviews | **66.7% of reviews** | 42.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 6 MB | 86 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [EONSOFT](https://appshunter.io/developer/899851112) | [Blynk Technologies](https://appshunter.io/developer/808760484) |

## What reviewers say

### Resistor Calc+

[App page](https://appshunter.io/ios/app/resistor-calc-plus/id1441211200)

This utility helps you determine the resistance value of resistors by interpreting their colored bands. It supports 3, 4, 5, and 6 band resistors, visually displaying your selections and the calculated resistance and tolerance.

**Highlights:** Calculates resistance for 3-6 band resistors, Visual band color selection, Displays resistance and tolerance, Aids electronics configuration, User-friendly interface

**Features:** Vision Pro support

**In-app purchases:** none


### Blynk IoT

[App page](https://appshunter.io/ios/app/blynk-iot/id1559317868)

Build custom IoT apps without coding using a drag-and-drop interface. Manage devices, users, and data remotely with a powerful web console and scalable cloud infrastructure. Supports over 400 hardware boards and various connection options.

**Highlights:** Drag-n-drop IoT app builder, Device and user management, OTA firmware updates, Secure cloud infrastructure, Hardware compatibility (400+ boards), Real-time alerts and automations

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Blynk MAKER - Monthly | $6.99 | per month |
| Blynk Starter - Monthly | $29.00 | per month |
| Blynk PRO (40 users) Monthly | $48.99 | per month |
| Blynk MAKER - Yearly | $59.99 | per year |
| Blynk PRO (100 users) Monthly | $98.99 | per month |
| Blynk PRO (50 users) Monthly | $99.00 | per month |
| Blynk PRO (500 users) Monthly | $299.99 | per month |

**What reviewers like**

- 🚀 Easy to use
- 🚀 Powerful IoT platform
- 🚀 Efficient for rapid prototyping
- 👍 Great for hobbyists and businesses
- 👍 Stable and reliable

**What reviewers complain about**

- 💰 Expensive subscription model
- 🐛 Unstable, crashes frequently
- 🤔 Confusing for beginners
- 🤔 Lacks flexibility compared to legacy version
- 🤔 Limited free features

**Reported bugs**

- Connectivity issues with devices
- Widgets not working as expected
- Account deletion without warning
- Incompatibility with older hardware

**Requested features**

- Dark mode option
- Bluetooth support
- Better documentation and tutorials
- Restore legacy app functionality
- Affordable pricing for hobbyists


## Frequently asked questions

### Is Resistor Calc+ free?

Resistor Calc+ is free to download, with no in-app purchases.

### Is Blynk IoT free?

Blynk IoT is free to download, with in-app purchases available.

### Which has better reviews, Resistor Calc+ or Blynk IoT?

Resistor Calc+ is rated higher. Resistor Calc+ averages 5.0 out of 5 from 5 ratings, while Blynk IoT averages 4.5 from 828 ratings.

### Do Resistor Calc+ or Blynk IoT have ads?

Resistor Calc+ shows ads; Blynk IoT does not.

### Which is updated more often, Resistor Calc+ or Blynk IoT?

Resistor Calc+ ships an update every 2 months, and Blynk IoT monthly. Most recently, Resistor Calc+ was updated on October 7, 2026 and Blynk IoT on October 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*