# BookNapper vs eco

The clearest difference is update cadence: BookNapper at every 2 weeks against eco's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

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

BookNapper ships an update every 2 weeks, eco every 2 months. The most recent releases landed on September 16, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | BookNapper | eco |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (4 ratings)](https://appshunter.io/ios/app/eco-link-evo/id1516233388/reviews)** |
| Number of ratings | — | **4** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | — | Free |
| Size | 22 MB | 147 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cutedge](https://appshunter.io/developer/376975623) | [Quanteo Group](https://appshunter.io/developer/1516233387) |

## What reviewers say

### BookNapper

[App page](https://appshunter.io/ios/app/booknapper/id622350953)

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

**In-app purchases:** none


### eco

[App page](https://appshunter.io/ios/app/eco-link-evo/id1516233388)

This utility app connects to specific counting devices to retrieve and manage data. It allows users to initialize counters, view real-time counts, update firmware, and adjust sensor settings.

**Highlights:** Initialize Evo range counters, Display real-time count data, Retrieve data by date, Send data to Eco-Visio, Perform tests and diagnostics, Update firmware, Adjust sensor settings

**In-app purchases:** none


## Frequently asked questions

### Is BookNapper free?

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

### Is eco free?

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

### Do BookNapper or eco have ads?

Neither BookNapper nor eco shows ads.

### Which is updated more often, BookNapper or eco?

BookNapper ships an update every 2 weeks, and eco every 2 months. Most recently, BookNapper was updated on September 16, 2026 and eco on September 28, 2026.

---

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