Caldy vs Bubble Level & Measure Toolbox
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Caldy
This app offers a visual approach to calculations, linking values with arrows and allowing for dynamic editing of expressions. It supports organizing calculations into documents, plotting expressions, and includes various math functions. Ideal for complex calculations beyond basic arithmetic.
- Visual calculation linking
- Editable expressions with automatic updates
- Document-based organization
- Plotting and zooming capabilities
- Trigonometry and math functions
- Dark mode support
- Export sheets as images
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When you need more than a basic calculator, but do not want a spreadsheet. Caldy is a visual calculator: linked values are clearly shown with connecting arrows. The history is right in front of you. Caldy is a dynamic calculator: any number or operation can be changed and the linked expressions are updated automatically. Numbers can have labels, making the expressions easier to read. Results can be dragged and dropped on placeholders to connect expressions. Sub-expressions can be extracted to structure complex calculations. Sub-expressions can be extracted to structure complex calculations. Caldy percentage increase function, very handy to calculate tips or tax such as VAT. Caldy can plot expressions. Plots are zoomable and dynamic as well. Pinch on the plot to zoom in or out. Caldy is document-based. You can organize your calculation sheets like files, on your device or even on iCloud. Caldy has math functions, trigonometry functions. Caldy supports dark mode. All Clear button to clear the sheet. Undo and redo buttons. Cursor move buttons (left and right). Export to share the sheet as an image. A new intuitive calculator. - Familiar interface - Edit expressions anywhere anytime, results are updated automatically - Multiple sheets - Plots, pinch to change X range - Dark mode - Trigonometry functions, exponential, logarithm, percentage increase, absolute function - Add labels to numbers - Swap operands, extract subexpressions, move expressions
Bubble Level & Measure Toolbox
This app offers a precise bubble level, accurate digital ruler, smart angle finder, and wireless inspection camera. It transforms your device into a versatile measurement tool for various DIY and professional tasks, all while prioritizing user privacy and offline functionality.
- 3-in-1 Spirit Level & Clinometer
- Accurate Digital Ruler
- WiFi Inspection Camera / Endoscope (Pro)
- Apple Watch Sync (Pro)
- AR Laser Level & Plumb Bob (Pro)
- Smart Protractor (Pro)
- Decibel Meter / Sound Level (Pro)
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The precise bubble level, accurate digital ruler, smart angle finder, and wireless inspection camera in one powerful app. Measure Assistant is the ultimate digital toolbox for DIYers, campers, contractors, and professionals. Whether you need to hang pictures perfectly straight, align your washing machine, level your RV / camper, measure dimensions, or inspect hard-to-reach areas – Measure Assistant turns your iPhone and Apple Watch into a reliable, high-precision measurement tool. Completely without annoying ads and data collection! HIGHLIGHTS & TOOLS: 3-in-1 Spirit Level & Clinometer: Use the classic 360° circular bubble level (surface level) for flat objects, or the tubular levels for precise edges and inclines. The perfect water level for any home improvement or woodworking project. Accurate Digital Ruler: Measure objects directly on your screen. The interactive calipers can be precisely calibrated to your iPhone's size for exact millimeter (mm) and inch measurements. WiFi Inspection Camera / Endoscope (Pro): No more working blind! Turn your phone into a wireless borescope. Place your iPhone in dark, tight spots (engines, pipes, behind cabinets) and stream the live video to a second device (iPad, second phone) via local WiFi. Remote flashlight control included! Apple Watch Sync (Pro): A true hands-free experience! Read the spirit level, tilt meter, and decibel meter live directly on your wrist. Synchronizes in real-time – ideal when working under vehicles or heavy machinery. AR Laser Level & Plumb Bob (Pro): Project a virtual laser plumb line directly onto your walls using Augmented Reality (ARKit). Perfect for aligning tiles, pictures, and shelves over larger distances. Smart Protractor (Pro): Simply place your iPhone on any object or surface to measure the exact tilt angle and slope in degrees. Decibel Meter / Sound Level (Pro): Measure environmental noise and acoustic pollution in dB in real-time. Ideal for the workshop, construction site, or checking noise limits at the campsite. Premium Dark Mode: A high-contrast, OLED-optimized design that saves battery life and remains perfectly readable even outside in bright sunlight. 100% Privacy & Offline: No registration, no tracking, no ads. Your measurement data stays completely offline and only on your device. Turn your iPhone into the smartest measurement app in your toolbox. Download Measure Assistant for free today!
Screenshots
Verdict
The clearest difference is price: Bubble Level & Measure Toolbox at Free against Caldy's $2.99. Bubble Level & Measure Toolbox also leads on review sentiment (89% vs 57%) and update cadence (every 2 days vs fortnightly). Caldy's advantage is in-app purchases (none vs 1) and iOS requirement (17.6 vs 26.0). On ads 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
Bubble Level & Measure Toolbox is free to download; Caldy costs $2.99 up front. Bubble Level & Measure Toolbox sells 1 one-off in-app purchase. Caldy asks for nothing beyond the download.
Caldy ships an update fortnightly, Bubble Level & Measure Toolbox every 2 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.
| Parameter | Caldy | Bubble Level & Measure Toolbox |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 2.0 (2 ratings) — better | — |
| Positive reviews | 57.1% of reviews | 88.9% of reviews — better |
| Number of ratings | 2 — better | — |
| Update frequency | Fortnightly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone | iPhone, iPad, Apple Watch — better |
| Requires iOS | 17.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 1 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Alventir Ltd | Marco Pohl |
Customer experience
Caldy
Bubble Level & Measure Toolbox
In-app purchases
Caldy
No in-app purchases
Bubble Level & Measure Toolbox
- PRO-Version$3.99
Questions
Is Caldy free?
Is Bubble Level & Measure Toolbox free?
Do Caldy or Bubble Level & Measure Toolbox have ads?
Which is updated more often, Caldy or Bubble Level & Measure Toolbox?
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