RCircuitCalc vs BudLabs
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RCircuitCalc
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.
- 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
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This application is intend for engineers and students who are wasting time for designing electric and electronic circuits. The standard resistance values based on E-series numbers are outputted in inputting necessary conditions such as input voltage, output voltage, current and so on. Features The calculable circuits are as follows: - Voltage Dividers (Inputting output voltage or resistance ratio) - Series Circuits - Parallel Circuits - Combination Circuits In the Voltage Dividers, resistance values are calculated in entering input voltage, output voltage or resistance ratio, and current into input boxes, besides, the most suitable resistance values are calculated in selecting priority whether Normal or Vout. In the Series Circuits, Parallel Circuits and Combination Circuits, divided resistance values are calculated in entering a combined resistance value into an input box. Calculated resistance values are displayed with the following E-series number specified either. E6, E12, E24, E48, E96 This application is able to calculate current and power of each resistor on calculated resistance values. Attention Because standard resistors are used and precision of calculation is ensured, the following restrictions are set up. - Range of resistance value: 1Ω ~ 10MΩ - Range of resistance ratio: 0.1 ~ 10
BudLabs
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.
- Tailored feeding schedules
- Nutrient calculator
- Manage multiple virtual crops
- Track crop growth phases
- Task management and notes
- Advanced Nutrients product info
- Retailer locator
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BudLabs is Advanced Nutrients’ mobile hydroponics grow guide that every grower, from beginner to expert, has been waiting for. It helps you organize each step of the grow process and gives you the feeding schedule, with the exact proportions of Advanced Nutrients products distributed each week. With BudLabs you will achieve reliable and consistent results in your grow room. Here are the features that will help you do that: Nutrient Calculator: - Choose the phase of your crop’s growth — grow or bloom. - Select your nutrient base of choice. - Select your level of grow experience. - Insert your precise reservoir size — BudLabs supports both gallons and liter calculations. - Based on your input, BudLabs will give you a tailored feeding schedule, complete with all Advanced Nutrients products, distributed within the correct weeks. Labs: - Create and manage multiple virtual crops simultaneously. - Each virtual crop you create in Labs boasts its own nutrient base and feeding schedule. - Visualize the growth phases of your crop throughout the grow process. You can even upload images to see your plant’s progress from seed to harvest. - Set the first day of your crop in the calendar and mark the beginning of the growth of your crops. - Manage your daily activities, write down all your tasks, and never forget a thing from your grow-room to-do list. Take advantage of our notes feature to jot down the details you don’t want to miss. - Edit tasks - No more missing crucial steps or misplacing priorities! Our tasks tool makes it easy to stay on top of your daily to-do’s. - Access and monitor your virtual crops — with logged start, end and cycle-switch dates, you never have to worry about skipping a step. - Managing more than one crop at a time? You can duplicate a crop to track your progress across multiple grows at once. - Follow your weekly nutrient calculation for a perfectly balanced grow room. - Get reminders for each activity within your virtual crop. - Take pride in your latest grow, while taking stock of what worked best. You can view your completed crops and tasks while strategizing the best steps for an optimal return to the garden. - Share your cannabis crop data - notes, tasks, images, and more - at growjournals.budlabsapp.com, and show off your grows on social media. Engage with others commenting on your progress and elevate your home-growing experience. Products: - BudLabs includes information for every Advanced Nutrients product, including its exact purpose and how it affects the plant. News: - Select your preferred location and get access to the latest Advanced Nutrients news and promotions. - BudLabs will send you push notifications for the latest “News”. Where to buy: - Always up-to-date map of all Advanced Nutrients’ retailers around the world. - Locate all the nearby stores where you can stock up on Advanced Nutrients products. - Contact selected stores by way of a simple tap, or just allow BudLabs to guide you to their location. Grower Support: - Connect with the world-famous Advanced Nutrients Grower Support team in one tap. - Have our experts answer all the grow-related questions you may have. ------------ * Terms of use: https://budlabsapp.com/terms-of-use * Privacy policy: https://budlabsapp.com/privacy-policy
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | RCircuitCalc | BudLabs |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 1.0 (5 ratings) | 3.2 (77 ratings) — better |
| Positive reviews | 0.0% of reviews | 36.5% of reviews — better |
| Number of ratings | 5 | 77 — better |
| Update frequency | Every 17 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 36 MB |
| Age rating | 4+ | 17+ |
| Developer | TAKAHIKO FUKUYAMA | Advanced Nutrients |
Customer experience
RCircuitCalc
BudLabs
Bugs and requests
RCircuitCalc
Not enough reviews yet to summarise bugs or requests.
BudLabs
Reported bugs
13 issues- App crashes
- App freezes
- App does not work
- App not opening
- App under maintenance message
Show 8 moreShow fewer
- Cannot check or uncheck tasks
- Cannot start new crops or duplicate
- App stopped working after update
- Pro access not working
- Subscription not recognized
- App crashes non stop
- App closes right away
- Bug: App does not open
Requested features
31 requests- 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
Show 26 moreShow fewer
- Add in-app notes section
- Add other nutrients to calculator
- Option to go off pot size, not just reservoir
- Ability to add more info like pH and PPM
- User wiki for nutrient info
- Interaction with IFTTT or Alexa
- Consider lighting and humidity based on location
- Ability to increase/decrease nutrients by 1 gallon/L
- Measurement conversion options (fl oz, ml, gallons)
- Ability to move crops in Labs
- New crops added to top of list
- Ability to edit crop names
- Work with completed crops (view, copy, repeat)
- Ability to edit 'To-do tasks'
- Priority Grower Support for subscribers
- Calibrate for iPhone Max screen
- Add a calendar for feeding days
- Save calculations for larger grows
- Higher max for gallons in calculator
- Set up several 'grows' with selected products
- More personalized features for saving individual crop calculations
- Dark mode option
- Advanced analytics dashboard
- Ability to track multiple plants for free
- More user-friendly interface
- More information or ability to access it
In-app purchases
RCircuitCalc
No in-app purchases
BudLabs
No in-app purchases









