# Fill it Forward vs Featherweight UI

The clearest difference is rating: Featherweight UI at 4.3 against Fill it Forward's 3.4. Featherweight UI also leads on review sentiment (50% vs 38%). On price, ratings volume, update cadence and ads there is nothing between them.

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

Featherweight UI holds the better App Store score, 4.3 against 3.4. Both are backed by a comparable volume of ratings — 16 and 12 respectively. Written reviews point the same way: 38% of Fill it Forward's written reviews are positive against 50% of Featherweight UI's.

Fill it Forward ships an update monthly, Featherweight UI every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Fill it Forward | Featherweight UI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (16 ratings)](https://appshunter.io/ios/app/fill-it-forward/id1375687335/reviews) | **[4.3 (12 ratings)](https://appshunter.io/ios/app/featherweight-ui/id1641310058/reviews)** |
| Number of ratings | **16** | 12 |
| Positive reviews | 37.7% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 184 MB | 101 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Green Menu Inc.](https://appshunter.io/developer/966545400) | [Featherweight Altimeters LLC](https://appshunter.io/developer/1641310060) |

## What reviewers say

### Fill it Forward

[App page](https://appshunter.io/ios/app/fill-it-forward/id1375687335)

This app connects you to a community focused on giving back and environmental responsibility. Track your positive impact, contribute to charitable projects, and stay hydrated by scanning your reusable bottle or sticker.

**Highlights:** Contribute to charitable projects, Track environmental impact, Join community groups and leaderboards, Monitor beverage consumption, Earn status levels and discounts, Enter community draws, Find refill stations

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

**In-app purchases:** none

**What reviewers like**

- 💚 Meaningful environmental and social impact mission
- 💧 Motivates increased water consumption and hydration
- 🎯 Simple scanning concept for tracking reuses
- 🏆 Gamification features with groups and leaderboards
- 📊 Visual impact tracking showing environmental savings

**What reviewers complain about**

- 🐛 Frequent app crashes and freezing
- 📱 White screen/blank screen issues on launch
- 📷 Camera/scanner consistently fails to read QR codes
- ⏱️ Extremely slow loading times and performance lag
- 🔄 Data tracking inaccuracies and lost records

**Reported bugs**

- Camera scanner won't focus or read QR codes
- App crashes immediately after scanning
- White/blank screen appears on app launch
- Reuse data shows zero or incorrect values
- Profile picture cannot be saved

**Requested features**

- Add friends and create private group competitions
- Monthly/yearly impact statistics and history logs
- Daily water intake tracking by day/month/year
- Integration with Apple Health app for water tracking
- Support for multiple bottles with different sizes


### Featherweight UI

[App page](https://appshunter.io/ios/app/featherweight-ui/id1641310058)

Connect your Bluetooth-enabled Featherweight Altimeters products to your phone. View live sensor data, configure settings, download flight information, and track your rocket's position and velocity with a live map.

**Highlights:** Connects to BLE Featherweight Altimeters, View live sensor data, Set deployment conditions, Download and review flight data, Track rocket position and velocity, Live map for recovery planning

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

**In-app purchases:** none


## Frequently asked questions

### Is Fill it Forward free?

Fill it Forward is free to download, with no in-app purchases.

### Is Featherweight UI free?

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

### Which has better reviews, Fill it Forward or Featherweight UI?

Featherweight UI is rated higher. Fill it Forward averages 3.4 out of 5 from 16 ratings, while Featherweight UI averages 4.3 from 12 ratings.

### Do Fill it Forward or Featherweight UI have ads?

Neither Fill it Forward nor Featherweight UI shows ads.

### Which is updated more often, Fill it Forward or Featherweight UI?

Fill it Forward ships an update monthly, and Featherweight UI every 3 weeks. Most recently, Fill it Forward was updated on October 24, 2026 and Featherweight UI on October 25, 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.*