# Fill it Forward vs MDex

The clearest difference is review sentiment: MDex at 100% against Fill it Forward's 38%. MDex also leads on rating (4.9 vs 3.4) and ratings volume (89 vs 16). On price, update cadence, ads 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.

MDex holds the better App Store score, 4.9 against 3.4. That said, the two scores are not equally well evidenced: MDex has 89 ratings behind it against 16, so its average is the more settled of the two. Written reviews point the same way: 38% of Fill it Forward's written reviews are positive against 100% of MDex's.

Fill it Forward ships an update monthly, MDex every 3 weeks. The most recent releases landed on October 14, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Fill it Forward | MDex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (16 ratings)](https://appshunter.io/ios/app/fill-it-forward/id1375687335/reviews) | **[4.9 (89 ratings)](https://appshunter.io/ios/app/mdex/id6462492208/reviews)** |
| Number of ratings | 16 | **89** |
| Positive reviews | 37.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 184 MB | 83 MB |
| Requires iOS | 15.1 | **12.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Green Menu Inc.](https://appshunter.io/developer/966545400) | [Julius Stuhec](https://appshunter.io/developer/1703106782) |

## 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


### MDex

[App page](https://appshunter.io/ios/app/mdex/id6462492208)

This app helps University of Michigan students navigate campus life. It provides real-time bus tracking, event discovery, and connects users with campus clubs and communities. Access campus resources and giveaways to enhance your student experience.

**Highlights:** Discover campus events, Real-time bus tracking, Connect with clubs, Access campus resources, Find giveaways

**Features:** macOS Compatibility

**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 MDex free?

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

### Which has better reviews, Fill it Forward or MDex?

MDex is rated higher. Fill it Forward averages 3.4 out of 5 from 16 ratings, while MDex averages 4.9 from 89 ratings.

### Do Fill it Forward or MDex have ads?

Neither Fill it Forward nor MDex shows ads.

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

Fill it Forward ships an update monthly, and MDex every 3 weeks. Most recently, Fill it Forward was updated on October 14, 2026 and MDex on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*