# RCircuitCalc vs BudLabs

The clearest difference is price: BudLabs at Free against RCircuitCalc's $1.99. BudLabs also leads on rating (3.2 vs 1.0) and review sentiment (36% vs 0%). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

BudLabs is free to download; RCircuitCalc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

BudLabs holds the better App Store score, 3.2 against 1.0. That said, the two scores are not equally well evidenced: BudLabs has 77 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 0% of RCircuitCalc's written reviews are positive against 36% of BudLabs's.

RCircuitCalc ships an update every 17 months, BudLabs every 2 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | RCircuitCalc | BudLabs |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [1.0 (5 ratings)](https://appshunter.io/ios/app/rcircuitcalc/id857468508/reviews) | **[3.2 (77 ratings)](https://appshunter.io/ios/app/budlabs/id1174388506/reviews)** |
| Number of ratings | 5 | **77** |
| Positive reviews | 0.0% of reviews | **36.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 7 MB | 36 MB |
| Requires iOS | 13.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [TAKAHIKO FUKUYAMA](https://appshunter.io/developer/857468511) | [Advanced Nutrients](https://appshunter.io/developer/1223498164) |

## What reviewers say

### RCircuitCalc

[App page](https://appshunter.io/ios/app/rcircuitcalc/id857468508)

This app helps engineers and students design electrical and electronic circuits by calculating standard resistance values based on E-series numbers. It supports various circuit types, including voltage dividers, series, parallel, and combination circuits, and can also calculate current and power for each resistor.

**Highlights:** Calculates standard resistance values, Supports voltage dividers, series, parallel, and combination circuits, Calculates current and power for resistors, Outputs resistance values based on E-series numbers (E6, E12, E24, E48, E96), Calculations based on input voltage, output voltage, current, and resistance ratio

**Features:** macOS Compatibility

**In-app purchases:** none


### BudLabs

[App page](https://appshunter.io/ios/app/budlabs/id1174388506)

This hydroponics grow guide helps growers of all levels organize their cultivation process. It provides tailored feeding schedules with precise nutrient proportions and allows users to manage multiple virtual crops, track progress, and access product information.

**Highlights:** Tailored feeding schedules, Nutrient calculator, Manage multiple virtual crops, Track crop growth phases, Task management and notes, Advanced Nutrients product info, Retailer locator

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Helpful for tracking grows
- 👍 Calculates nutrient needs
- 👍 Easy to use calculator
- 👍 Good for beginners
- 👍 Useful for experienced growers

**What reviewers complain about**

- 🐛 App crashes frequently
- 🐛 App freezes often
- 🐛 App does not work
- 🐛 Useless for autos
- 🐛 Nutrient ratios are wrong

**Reported bugs**

- App crashes
- App freezes
- App does not work
- App not opening
- App under maintenance message

**Requested features**

- Ability to input pH and PPM
- Grower suggestions for adjustments
- All grow info in one place
- Edit or delete entries on to-do list
- Support for autoflower community


## Frequently asked questions

### Is RCircuitCalc free?

RCircuitCalc costs $1.99, with no in-app purchases.

### Is BudLabs free?

BudLabs is free to download, with no in-app purchases.

### Which has better reviews, RCircuitCalc or BudLabs?

BudLabs is rated higher. RCircuitCalc averages 1.0 out of 5 from 5 ratings, while BudLabs averages 3.2 from 77 ratings.

### Do RCircuitCalc or BudLabs have ads?

Neither RCircuitCalc nor BudLabs shows ads.

### Which is updated more often, RCircuitCalc or BudLabs?

RCircuitCalc ships an update every 17 months, and BudLabs every 2 months. Most recently, RCircuitCalc was updated on November 6, 2026 and BudLabs on November 2, 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.*