# Duffle vs FLEX

The clearest difference is ads: FLEX at none against Duffle's shown. FLEX also leads on monetization model (free vs ad-supported). Duffle's advantage is rating (5.0 vs 4.7) and update cadence (every 6 days vs every 2 weeks). On price, review sentiment, ratings volume 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.

Duffle holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 4 and 11 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Duffle ships an update every 6 days, FLEX every 2 weeks. The most recent releases landed on June 4, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Duffle | FLEX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/duffle/id6739775801/reviews)** | [4.7 (11 ratings)](https://appshunter.io/ios/app/flex-instant-payments/id6740035091/reviews) |
| Number of ratings | 4 | **11** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 6 days** | Every 2 weeks |
| Monetization | Ad-supported | **Free** |
| Size | 126 MB | 151 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IVORYCHAIN TECHNOLOGIES (PTY) LTD](https://appshunter.io/developer/1686727862) | [Koinage LLC](https://appshunter.io/developer/1558567429) |

## What reviewers say

### Duffle

[App page](https://appshunter.io/ios/app/duffle/id6739775801)

Easily spend, send, and receive digital currencies with this app. It supports various cryptocurrencies and networks, offering a secure and simplified way to manage your assets without requiring crypto knowledge from merchants. Refer friends to earn rewards and grow your portfolio.

**Highlights:** Spend crypto anywhere, Simplified sending and receiving, Duffle Tags for easy transactions, Support for multiple cryptocurrencies and networks, Military-grade encryption for security, Refer and earn rewards

**Features:** macOS Compatibility

**In-app purchases:** none


### FLEX

[App page](https://appshunter.io/ios/app/flex-instant-payments/id6740035091)

Send and receive money instantly in Nigeria using a unique PayTag. Easily pay merchants via QR codes or directly in the app, and request funds with notes for clear tracking. Upgrade your tier for higher limits and enhanced features.

**Highlights:** Instant money sending and receiving, Pay with PayTag, Merchant QR code payments, Request money with notes, Tiered verification for higher limits, Real-time transaction tracking, In-app support

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

**In-app purchases:** none


## Frequently asked questions

### Is Duffle free?

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

### Is FLEX free?

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

### Which has better reviews, Duffle or FLEX?

Duffle is rated higher. Duffle averages 5.0 out of 5 from 4 ratings, while FLEX averages 4.7 from 11 ratings.

### Do Duffle or FLEX have ads?

Duffle shows ads; FLEX does not.

### Which is updated more often, Duffle or FLEX?

Duffle ships an update every 6 days, and FLEX every 2 weeks. Most recently, Duffle was updated on June 4, 2026 and FLEX on September 11, 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.*