# U Call Pay vs Fly

The clearest difference is review sentiment: U Call Pay at 98% against Fly's 0%. U Call Pay also leads on ratings volume (1K vs 5) and update cadence (every 3 weeks vs every 3 months). Fly's advantage is rating (5.0 vs 4.8) and iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Fly holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: U Call Pay has 1K ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 98% of U Call Pay's written reviews are positive against 0% of Fly's, so the app with the better star average is not the one people write more warmly about.

U Call Pay ships an update every 3 weeks, Fly every 3 months. The most recent releases landed on September 9, 2026 and August 29, 2026 respectively.

## The numbers

| Metric | U Call Pay | Fly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (1K ratings)](https://appshunter.io/ios/app/u-call-pay/id1492178675/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/fly-ebike/id1619123232/reviews)** |
| Number of ratings | **1K** | 5 |
| Positive reviews | **97.9% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Free | Free |
| Size | 62 MB | 53 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [3 Billionaires Corp](https://appshunter.io/developer/1476105863) | [Flyebike Inc](https://appshunter.io/developer/1619123234) |

## What reviewers say

### U Call Pay

[App page](https://appshunter.io/ios/app/u-call-pay/id1492178675)

Manage your phone number privately and make/receive calls without revealing your primary number. This app also offers a secure and user-friendly way to top up your prepaid mobile service.

**Highlights:** Private phone number management, Make and receive calls privately, Secure prepaid mobile top-up, User-friendly interface, Seamless navigation

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

**In-app purchases:** none


### Fly

[App page](https://appshunter.io/ios/app/fly-ebike/id1619123232)

Enhance your electric bike experience with intelligent features. This app offers a new way to enjoy colorful riding life through its connected functionalities.

**Highlights:** Intelligent riding experience, Connected functionalities, New riding lifestyle, Full range of features

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is U Call Pay free?

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

### Is Fly free?

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

### Which has better reviews, U Call Pay or Fly?

Fly is rated higher. U Call Pay averages 4.8 out of 5 from 1K ratings, while Fly averages 5.0 from 5 ratings.

### Do U Call Pay or Fly have ads?

Neither U Call Pay nor Fly shows ads.

### Which is updated more often, U Call Pay or Fly?

U Call Pay ships an update every 3 weeks, and Fly every 3 months. Most recently, U Call Pay was updated on September 9, 2026 and Fly on August 29, 2026.

---

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