# Effe ECC vs Ozlo Sleepbuds

The clearest difference is update cadence: Ozlo Sleepbuds at weekly against Effe ECC's every 4 months. Effe ECC's advantage is iOS requirement (15.6 vs 18.0). 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.

Effe ECC ships an update every 4 months, Ozlo Sleepbuds weekly. The most recent releases landed on September 13, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Effe ECC | Ozlo Sleepbuds |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (2.7K ratings)](https://appshunter.io/ios/app/ozlo-sleepbuds/id6447005546/reviews)** |
| Number of ratings | — | **2.7K** |
| Positive reviews | — | 44.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 16 MB | 268 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [EFFEGIBI](https://appshunter.io/developer/914420304) | [Drowsy Digital Inc](https://appshunter.io/developer/1679994355) |

## What reviewers say

### Effe ECC

[App page](https://appshunter.io/ios/app/effe-ecc/id1481172358)

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

**In-app purchases:** none


### Ozlo Sleepbuds

[App page](https://appshunter.io/ios/app/ozlo-sleepbuds/id6447005546)

Tiny, ultra-comfy headphones designed for optimal sleep. They offer all-night battery, noise blocking, audio streaming, and biometric sensing. The companion app allows for personalized settings and sleep data reporting.

**Highlights:** Ultra-comfy, low-profile design, All-night battery life, Noise blocking sleep sounds, Stream any audio content, Personal in-ear alarm, Biometric sleep sensing, Phone-free operation

**In-app purchases:** none

**What reviewers like**

- 💤 Comfortable for side sleeping
- 🌙 Helps with sleep and tinnitus
- 🔕 Blocks out noise like snoring
- 🕰️ Alarm wakes user without disturbing partner
- 🔊 Good sound quality and variety of sleep sounds

**What reviewers complain about**

- 🔌 Battery life issues, drains quickly
- 📶 Bluetooth connectivity problems, frequent disconnections
- 🤖 Glitchy app with stability and UX problems
- 🔊 Limited volume control and sound options
- ⚠️ Mandatory updates cause disruptions

**Reported bugs**

- Earbuds not charging properly in case
- Sync issues between left and right earbuds
- App fails to connect or update firmware
- Sleep timer function is not working as expected

**Requested features**

- Allow custom sleep sounds and playlists
- Add phone-free mode to use without app
- Improve alarm features to work with phone alarms
- Expand sound library with more options like nature sounds


## Frequently asked questions

### Is Effe ECC free?

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

### Is Ozlo Sleepbuds free?

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

### Do Effe ECC or Ozlo Sleepbuds have ads?

Neither Effe ECC nor Ozlo Sleepbuds shows ads.

### Which is updated more often, Effe ECC or Ozlo Sleepbuds?

Effe ECC ships an update every 4 months, and Ozlo Sleepbuds weekly. Most recently, Effe ECC was updated on September 13, 2026 and Ozlo Sleepbuds on September 25, 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.*