# Thumsters vs BLÜ

The clearest difference is rating: Thumsters at 4.7 against BLÜ's 3.9. Thumsters also leads on ratings volume (873 vs 15) and review sentiment (69% vs 55%). BLÜ's advantage is in-app purchases (none vs 7) and iOS requirement (13.0 vs 15.1). On price, update cadence and ads there is nothing between them.

Both are free to download. Thumsters sells 7 in-app purchases, starting at $1.99 per 7 days. BLÜ asks for nothing beyond the download.

Thumsters holds the better App Store score, 4.7 against 3.9. That said, the two scores are not equally well evidenced: Thumsters has 873 ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 69% of Thumsters's written reviews are positive against 55% of BLÜ's.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 15, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Thumsters | BLÜ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (873 ratings)](https://appshunter.io/ios/app/thumsters-behavior-tracker/id1274298804/reviews)** | [3.9 (15 ratings)](https://appshunter.io/ios/app/blu/id1463447042/reviews) |
| Number of ratings | **873** | 15 |
| Positive reviews | **68.7% of reviews** | 54.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 92 MB | 18 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | +4 | 4+ |
| Developer | [KØBEN digital](https://appshunter.io/developer/1225099509) | [Tim Diasti](https://appshunter.io/developer/1448095690) |

## What reviewers say

### Thumsters

[App page](https://appshunter.io/ios/app/thumsters-behavior-tracker/id1274298804)

This app helps parents foster positive behavior and build stronger connections with their children through a reward-based tracking system. It offers tools for habit formation, emotional coaching, and consistent parenting across multiple caregivers, designed for children aged 4-12.

**Highlights:** Real-time behavior tracking (thumbs up/down), Kid-friendly chore list and reward system, Emotional coaching and awareness tools, Multi-device syncing for caregivers, Customizable reward system, Designed for ages 4-12

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium Subscription | $1.99 | per 7 days |
| Monthly Premium Subscription | $7.99 | per month |
| Monthly Premium Subscription | $12.99 | per month |
| 6 Month Premium Subscription | $39.99 | per 6 months |
| Yearly Premium Subscription | $47.99 | per year |
| 6 month premium subscription | $59.99 | per 6 months |
| ThumbsUp full account - 1 year | $79.99 | per year |

**What reviewers like**

- 👍 Great app for tracking daily behavior
- 👍 Friendly and intuitive UX
- 👍 Effective reward system with thumbs up/down
- 👍 Customizable goals and reasons
- 👍 Helpful for improving kids' behavior

**What reviewers complain about**

- 🐛 Crashes and bugs, especially when adding photos
- 🔋 App drains battery quickly
- 🔒 Issues with account syncing and multi-device access
- 🔒 Lack of child-specific profile and controls
- 🔒 Too many steps required to give thumbs up/down

**Reported bugs**

- Crashes when adding child profiles
- Sync issues between devices
- Thumbs up/down disappearing or not registering properly
- Inconsistent behavior after app updates

**Requested features**

- Allow kids to track their own progress
- Add more customization options for goals and rewards
- Implement better reporting and analytics
- Improve Apple Watch integration
- Simplify the process of giving thumbs up/down


### BLÜ

[App page](https://appshunter.io/ios/app/blu/id1463447042)

This app, paired with a smart toothbrush, helps users and their families develop better oral hygiene habits. It uses advanced tracking to ensure complete coverage, offers personalized recommendations, and allows sharing data with dental professionals. Gamified features encourage consistent brushing for all ages.

**Highlights:** Brush location detection with smart tracking, Family monitoring and peer competition, Personalized brushing recommendations, Dentist/hygienist data sharing, Smart brushing timer (2 minutes), Brush head replacement alerts

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Thumsters free?

Thumsters is free to download, with in-app purchases available.

### Is BLÜ free?

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

### Which has better reviews, Thumsters or BLÜ?

Thumsters is rated higher. Thumsters averages 4.7 out of 5 from 873 ratings, while BLÜ averages 3.9 from 15 ratings.

### Do Thumsters or BLÜ have ads?

Neither Thumsters nor BLÜ shows ads.

### Which is updated more often, Thumsters or BLÜ?

Thumsters ships an update fortnightly, and BLÜ fortnightly. Most recently, Thumsters was updated on October 15, 2026 and BLÜ on October 3, 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.*