Chippy Tools vs OneCalc Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Chippy Tools
This app simplifies complex calculations for construction professionals. It offers a variety of tools for tasks like spacing, measurements, and material estimation, helping to reduce errors and save time on job sites. Available on iPhone and iPad, it aims to be an essential tool for tradespeople.
- Baluster spacing calculator
- Flat run attached baluster calculator
- Square calculator
- Concrete calculator
- Stair calculator
- Supports millimeters, feet, and inches
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Chippy Tools is the must-have calculator for carpenters and handy folks looking to simplify math on the job. Whether you're on your iPhone or iPad, Chippy Tools is for you. Its user-friendly design lets you focus on carpentry while the app handles the math. Perfect for architects, builders, carpenters, construction workers, contractors, designers, engineers, tradespeople, and woodworkers of all kinds, Chippy Tools speeds up common calculations with precision. Save time and cut costs by reducing site errors. WHAT IS A CHIPPY? In Australia, carpenters are often called Chippy. WHY CHIPPY TOOLS? Our mission at Chippy Tools is to redefine top-notch apps for carpenters. We aim to develop a sustainable business model, adding new calculations to keep saving you time and money. FEATURES • Baluster spacing calculator - Quickly calculate spacing for flat runs. • Flat run attached baluster calculator - Simple, fast calculations for attached balusters. • Supports millimeters, feet, and inches. PREMIUM FEATURES (Requires Subscription) • Square calculator - Ensure structures are perfectly square. • Concrete calculator - Calculate concrete needed for slabs and posts. • Dumpy level calculator - Find relative level from benchmarks. • Equal spacing calculator - Calculate even spacing effortlessly. • Gravel calculator - Determine gravel volume needed. • Pitch calculator - Calculate pitch with rise and run. • Raked wall calculator - Measure raked walls using height or pitch. • Running calculations - Enter start number and interval. • Soil calculator - Find soil volume for landscaping. • Stair calculator - Calculate going, stringer, and rise for stairs. • Triangle calculator - Solve triangle measurements with ease. FEEDBACK Want a new calculator? Email us at feedback@chippy.tools. NO ADS EVER We promise no ads in Chippy Tools. Enjoy the best experience for your purchase. SUPPORT Got questions or feedback? Contact us for free tech support at support@chippy.tools. If Chippy Tools aids you, please leave an App Store review to help others find it. Subscription Terms of Service: https://chippy.tools/terms/ Proudly made in Brisbane, Australia.
OneCalc Pro
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One calm, capable calculator that replaces a dozen apps cluttering your Home Screen. OneCalc brings together everyday maths, scientific functions, currency and unit conversion, and a genuinely useful pay tracker — all in one beautifully simple app, with no ads, no accounts, and no data leaving your device. Standard and scientific calculator Switch instantly between a clean everyday calculator and full scientific functions, with a scrollable history so you never lose a previous sum. Pay and overtime tracker Built for shift workers. Add jobs and pay rates, set night and weekend multipliers, and watch your earnings update live as you work. No spreadsheets, no guesswork. Scan and Solve Point your camera at a maths problem — textbook, worksheet, whiteboard — and get a clear, step-by-step AI-powered solution in seconds. Live currency, unit and time conversion Convert between 30+ currencies using official ECB rates, with full offline support. Unit, time and percentage converters are built right in for travel, cooking, work or study. Discounts and loans, sorted Work out sale prices and savings instantly, or calculate loan repayments before you commit. Practical tools, no faff. Make it yours Choose from 9 accent themes to match your style, use the Apple Watch app for calculations on the go, and add the interactive widget to your Home Screen for instant access. OneCalc is free to download and use for standard and scientific calculations. Premium unlocks the pay tracker, Scan & Solve, currency conversion, loan and discount calculators, and all themes, with a 3-day free trial. Premium is available as a £9.99 per year subscription or a £29.99 one-time lifetime purchase — your choice, no pressure. One app instead of many. No ads. No accounts. Your data stays on your device. Download OneCalc and see how calm a calculator can feel. https://annmarstudio.co.uk/onecalc/terms https://annmarstudio.co.uk/onecalc/privacy
Screenshots
Verdict
The clearest difference is iOS requirement: Chippy Tools at 16.0 against OneCalc Pro's 18.0. On price, update cadence, ads and in-app purchases 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
Both are free to download. Chippy Tools sells 9 in-app purchases, starting at $2.99 per 7 days and OneCalc Pro sells 2 in-app purchases, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.
Chippy Tools ships an update every 8 days, OneCalc Pro every 2 weeks. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.
| Parameter | Chippy Tools | OneCalc Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (907 ratings) — better | — |
| Positive reviews | 54.8% of reviews | — |
| Number of ratings | 907 — better | — |
| Update frequency | Every 8 days — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad | iPhone, Mac, Apple Watch — better |
| Requires iOS | 16.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 46 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Peth Pty Ltd | ANNMAR limited |
Bugs and requests
Chippy Tools
Reported bugs
2 issues- Square check feature not working
- Measurements disappear after partial use
Requested features
4 requests- Add more construction-related calculators
- Improve stair and rafter tools
- Include material quantity estimations
- Add support for metric and imperial units
OneCalc Pro
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Chippy Tools
- Chippy Tools Pro - Weekly1 Month trial$2.997 Days
- Chippy Tools Pro - Weekly3 Days trial$3.997 Days
- Chippy Tools Pro - Quarterly3 Months trial$4.993 Months
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- Chippy Tools Pro - Monthly$5.991 Month
- Chippy Tools Pro - Monthly1 Month trial$5.991 Month
- Chippy Tools Pro - Annual3 Days trial$19.991 Year
- Chippy Tools Pro - Annual1 Year trial$19.991 Year
- Chippy Tools Pro - Annual$19.991 Year
- One Time Purchase2 variants$85.00
OneCalc Pro
- OneCalc Premium Annual$9.991 Year
- OneCalc Unlock Everything$29.99
Questions
Is Chippy Tools free?
Is OneCalc Pro free?
Do Chippy Tools or OneCalc Pro have ads?
Which is updated more often, Chippy Tools or OneCalc Pro?
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