# E4 Flex vs Bynaus AI Sitewalk

The clearest difference is in-app purchases: E4 Flex at none against Bynaus AI Sitewalk's 3. E4 Flex also leads on iOS requirement (13.1 vs 15.0). Bynaus AI Sitewalk's advantage is update cadence (weekly vs every 21 months). On price, ads and device support there is nothing between them.

Both are free to download. Bynaus AI Sitewalk sells 3 in-app purchases, starting at $9.99 per month. E4 Flex asks for nothing beyond the download.

E4 Flex ships an update every 21 months, Bynaus AI Sitewalk weekly. The most recent releases landed on October 20, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | E4 Flex | Bynaus AI Sitewalk |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/e4-flex/id1593079643/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Weekly** |
| Monetization | Free | — |
| Size | 1 MB | 171 MB |
| Requires iOS | **13.1** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Paul Hamel](https://appshunter.io/developer/1593079645) | [Bynanus](https://appshunter.io/developer/1737543576) |

## What reviewers say

### E4 Flex

[App page](https://appshunter.io/ios/app/e4-flex/id1593079643)

This app enables field technicians to connect to and manage E4 Flex readers via Bluetooth Low Energy. It allows for sending commands and receiving responses, facilitating configuration and testing of the readers.

**Highlights:** Connect to E4 Flex readers via BLE, Send commands to readers, Receive responses from readers, Configure E4 Flex readers, Test E4 Flex readers

**In-app purchases:** none


### Bynaus AI Sitewalk

[App page](https://appshunter.io/ios/app/bynaus-ai-sitewalk/id6754751858)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Essential | $9.99 | per month |
| Professional | $19.99 | per month |
| Enterprise | $49.00 | per month |


## Frequently asked questions

### Is E4 Flex free?

E4 Flex is free to download, with no in-app purchases.

### Is Bynaus AI Sitewalk free?

Bynaus AI Sitewalk is free to download, with in-app purchases available.

### Do E4 Flex or Bynaus AI Sitewalk have ads?

Neither E4 Flex nor Bynaus AI Sitewalk shows ads.

### Which is updated more often, E4 Flex or Bynaus AI Sitewalk?

E4 Flex ships an update every 21 months, and Bynaus AI Sitewalk weekly. Most recently, E4 Flex was updated on October 20, 2026 and Bynaus AI Sitewalk on October 28, 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.*