# mini Bubble Level vs FlowCalendar

The clearest difference is ads: FlowCalendar at none against mini Bubble Level's shown. FlowCalendar also leads on update cadence (every 2 days vs every 4 months). mini Bubble Level's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

mini Bubble Level ships an update every 4 months, FlowCalendar every 2 days. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | mini Bubble Level | FlowCalendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (26 ratings)](https://appshunter.io/ios/app/mini-bubble-level-angle-meter/id1111162128/reviews)** | — |
| Number of ratings | **26** | — |
| Positive reviews | 72.7% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 days** |
| Monetization | Ad-supported | — |
| Size | 7 MB | 15 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mert TUZER](https://appshunter.io/developer/1111162127) | [Masayuki Honda](https://appshunter.io/developer/1568838876) |

## What reviewers say

### mini Bubble Level

[App page](https://appshunter.io/ios/app/mini-bubble-level-angle-meter/id1111162128)

This app provides accurate horizontal and vertical angle measurements using your device's sensors. It helps with alignment tasks, offers haptic feedback, and supports dark mode for comfortable use in various environments.

**Highlights:** Precise angle measurements, Reference point marking, Haptic feedback for alignment, Dark mode support, Intuitive interface

**In-app purchases:** none


### FlowCalendar

[App page](https://appshunter.io/ios/app/flowcalendar/id6749845502)

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

**In-app purchases:** none


## Frequently asked questions

### Is mini Bubble Level free?

mini Bubble Level is free to download, with no in-app purchases.

### Is FlowCalendar free?

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

### Do mini Bubble Level or FlowCalendar have ads?

mini Bubble Level shows ads; FlowCalendar does not.

### Which is updated more often, mini Bubble Level or FlowCalendar?

mini Bubble Level ships an update every 4 months, and FlowCalendar every 2 days. Most recently, mini Bubble Level was updated on November 6, 2026 and FlowCalendar on October 30, 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.*