# Filtrete Smart vs Bubble Level

The clearest difference is rating: Filtrete Smart at 4.8 against Bubble Level's 4.0. Filtrete Smart also leads on ratings volume (52K vs 3) and iOS requirement (15.0 vs 17.0). Bubble Level's advantage is ads (none vs shown) and monetization model (free vs free with in-app purchases). On price, in-app purchases and device support there is nothing between them.

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

Filtrete Smart holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Filtrete Smart has 52K ratings behind it against 3, so its average is the more settled of the two.

Filtrete Smart ships an update every 2 months, Bubble Level every 2 weeks. The most recent releases landed on September 29, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Filtrete Smart | Bubble Level |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (52K ratings)](https://appshunter.io/ios/app/filtrete-smart/id1340390225/reviews)** | [4.0 (3 ratings)](https://appshunter.io/ios/app/bubble-level-neo/id1621303604/reviews) |
| Number of ratings | **52K** | 3 |
| Positive reviews | 38.8% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 100 MB | 15 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [3M Company](https://appshunter.io/developer/396772465) | [taishin miyamoto](https://appshunter.io/developer/1570395608) |

## What reviewers say

### Filtrete Smart

[App page](https://appshunter.io/ios/app/filtrete-smart/id1340390225)

Manage your home's air quality with smart filter and purifier control. Receive personalized tips, alerts for filter replacement based on usage, and monitor outdoor air quality trends.

**Highlights:** Pair multiple smart air filters, Real-time filter life tracking, Smart air purifier control, Remote device management, Non-smart filter reminders, Outdoor air quality monitoring

**In-app purchases:** none

**What reviewers like**

- 👍 Useful app for monitoring air filters
- 🚀 Convenient filter replacement reminders
- 👍 Helps track filter life and air quality
- 🚀 Easy to use and set up
- 👍 Improves indoor air quality

**What reviewers complain about**

- 🐛 Connectivity issues with filters
- 🐛 Inaccurate filter life estimates
- 🔋 High battery drain on mobile app
- 🔒 Privacy concerns with location tracking
- 💰 Expensive filters compared to regular ones

**Reported bugs**

- Barcode scanning feature not working
- App crashes when trying to add new filters
- Bluetooth connection frequently lost
- Incorrect filter life displayed in app

**Requested features**

- Allow manual filter life input
- Provide more detailed air quality data
- Integrate with other smart home systems
- Add option to disable location tracking
- Improve app stability and reliability


### Bubble Level

[App page](https://appshunter.io/ios/app/bubble-level-neo/id1621303604)

Transform your phone into a precise measuring tool for DIY and home improvement. Quickly check horizontal and vertical alignment with a clean interface and accurate sensor detection, eliminating the need for extra tools.

**Highlights:** Precise bubble level, Horizontal and vertical alignment, Easy-to-read interface, Accurate sensor detection, No extra tools needed

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

**In-app purchases:** none


## Frequently asked questions

### Is Filtrete Smart free?

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

### Is Bubble Level free?

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

### Which has better reviews, Filtrete Smart or Bubble Level?

Filtrete Smart is rated higher. Filtrete Smart averages 4.8 out of 5 from 52K ratings, while Bubble Level averages 4.0 from 3 ratings.

### Do Filtrete Smart or Bubble Level have ads?

Filtrete Smart shows ads; Bubble Level does not.

### Which is updated more often, Filtrete Smart or Bubble Level?

Filtrete Smart ships an update every 2 months, and Bubble Level every 2 weeks. Most recently, Filtrete Smart was updated on September 29, 2026 and Bubble Level on September 16, 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.*