# Caldy vs Bubble Level & Measure Toolbox

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.

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.

## The numbers

| Metric | Caldy | Bubble Level & Measure Toolbox |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[2.0 (2 ratings)](https://appshunter.io/ios/app/caldy-visual-calculator/id1577075538/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 57.1% of reviews | **88.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 37 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Alventir Ltd](https://appshunter.io/developer/1527058758) | [Marco Pohl](https://appshunter.io/developer/1884619135) |

## What reviewers say

### Caldy

[App page](https://appshunter.io/ios/app/caldy-visual-calculator/id1577075538)

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.

**Highlights:** 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

**In-app purchases:** none


### Bubble Level & Measure Toolbox

[App page](https://appshunter.io/ios/app/bubble-level-and-measure-toolbox/id6761162898)

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.

**Highlights:** 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)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO-Version | $3.99 | one-time |


## Frequently asked questions

### Is Caldy free?

Caldy costs $2.99, with no in-app purchases.

### Is Bubble Level & Measure Toolbox free?

Bubble Level & Measure Toolbox is free to download, with in-app purchases available.

### Do Caldy or Bubble Level & Measure Toolbox have ads?

Neither Caldy nor Bubble Level & Measure Toolbox shows ads.

### Which is updated more often, Caldy or Bubble Level & Measure Toolbox?

Caldy ships an update fortnightly, and Bubble Level & Measure Toolbox every 2 days. Most recently, Caldy was updated on November 3, 2026 and Bubble Level & Measure Toolbox on November 5, 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.*