# Flex Rewards vs Northern Waters Libraries

The clearest difference is iOS requirement: Flex Rewards at 11.0 against Northern Waters Libraries's 15.6. 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.

Flex Rewards ships an update every 4 weeks, Northern Waters Libraries every 6 weeks. The most recent releases landed on November 2, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Flex Rewards | Northern Waters Libraries |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (12 ratings)](https://appshunter.io/ios/app/flex-rewards/id1440722694/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 91.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 6 weeks |
| Monetization | Free | — |
| Size | 47 MB | 49 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Flextech.io Pte. Ltd.](https://appshunter.io/developer/1439878772) | [Northern Waters Libraries](https://appshunter.io/developer/1800165351) |

## What reviewers say

### Flex Rewards

[App page](https://appshunter.io/ios/app/flex-rewards/id1440722694)

This app digitizes loyalty stamp cards, allowing users to collect stamps and earn rewards from participating businesses. It offers features like welcome and birthday rewards, promotions, and prize draws for a streamlined loyalty experience.

**Highlights:** Collect digital stamps, Redeem rewards, Receive welcome rewards, Birthday rewards, View promotions, Set reminders, Enter prize draws

**Features:** macOS Compatibility

**In-app purchases:** none


### Northern Waters Libraries

[App page](https://appshunter.io/ios/app/northern-waters-libraries/id6742819019)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flex Rewards free?

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

### Is Northern Waters Libraries free?

Northern Waters Libraries is free to download, with no in-app purchases.

### Do Flex Rewards or Northern Waters Libraries have ads?

Neither Flex Rewards nor Northern Waters Libraries shows ads.

### Which is updated more often, Flex Rewards or Northern Waters Libraries?

Flex Rewards ships an update every 4 weeks, and Northern Waters Libraries every 6 weeks. Most recently, Flex Rewards was updated on November 2, 2026 and Northern Waters Libraries on October 6, 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.*