# U vs susGain

The clearest difference is review sentiment: susGain at 100% against U's 0%. susGain also leads on monetization model (free vs ad-supported). 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.

U ships an update monthly, susGain every 2 months. The most recent releases landed on October 26, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | U | susGain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (10 ratings)](https://appshunter.io/ios/app/susgain/id1664494870/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Ad-supported | **Free** |
| Size | 78 MB | 120 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Novena](https://appshunter.io/developer/649926386) | [SUSGAIN PTE. LTD.](https://appshunter.io/developer/1509388903) |

## What reviewers say

### U

[App page](https://appshunter.io/ios/app/u-popp/id1450603442)

Scan and upload retail receipts to earn points and redeem rewards like vouchers, exclusive deals, and event invites. Register for free to optimize your shopping experience and unlock member-exclusive benefits.

**Highlights:** Scan and upload retail receipts, Accumulate POPPoints, Redeem rewards from catalogue, Access exclusive deals, Get invites to member events

**Features:** Apple Wallet, Vision Pro support

**In-app purchases:** none


### susGain

[App page](https://appshunter.io/ios/app/susgain/id1664494870)

This app helps users adopt sustainable habits by earning points for eco-friendly actions. Points can be redeemed to support charitable causes. It also allows for organizing community challenges to track collective impact.

**Highlights:** Adopt sustainable habits, Earn points for good actions, Redeem points for causes, Organize community challenges, Measure collective impact, Track steps via HealthKit (optional)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is U free?

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

### Is susGain free?

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

### Do U or susGain have ads?

Neither U nor susGain shows ads.

### Which is updated more often, U or susGain?

U ships an update monthly, and susGain every 2 months. Most recently, U was updated on October 26, 2026 and susGain 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.*