# PeakflowLogger vs SleepNoize

The clearest difference is in-app purchases: SleepNoize at none against PeakflowLogger's 1. SleepNoize also leads on ads (none vs shown). PeakflowLogger's advantage is update cadence (weekly vs monthly). On price, review sentiment, device support and iOS requirement there is nothing between them.

PeakflowLogger costs $0.99 and SleepNoize $0.99 up front. PeakflowLogger sells 1 one-off in-app purchase. SleepNoize asks for nothing beyond the download.

PeakflowLogger ships an update weekly, SleepNoize monthly. The most recent releases landed on October 19, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | PeakflowLogger | SleepNoize |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/sleepnoize/id6754364010/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Monthly |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 3 MB | 1 MB |
| Requires iOS | 18.2 | **17.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [OT Consulting UG](https://appshunter.io/developer/1784934985) | [Core Dump Software LLC](https://appshunter.io/developer/1848050163) |

## What reviewers say

### PeakflowLogger

[App page](https://appshunter.io/ios/app/peakflowlogger/id6741367258)

Easily log and monitor your peak flow measurements to manage asthma and respiratory health. Visualize trends with color-coded zones and receive daily reminders. Securely sync data with healthcare providers.

**Highlights:** Peak flow measurement logging, Trend analysis charts, Color-coded health zones, Multiple user profiles, Daily measurement reminders, iCloud sync and data sharing

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### SleepNoize

[App page](https://appshunter.io/ios/app/sleepnoize/id6754364010)

This app generates calming ambient sounds and binaural beats to help you fall asleep, focus, or relax. It offers five distinct sound profiles and a smart sleep timer with fade-out functionality.

**Highlights:** Five ambient sound profiles, Binaural beats for mental states, Smart sleep timer with fade-out, Seamless looping for all-night use, Efficient background audio, Lock screen widget

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PeakflowLogger free?

PeakflowLogger costs $0.99, and also offers in-app purchases.

### Is SleepNoize free?

SleepNoize costs $0.99, with no in-app purchases.

### Do PeakflowLogger or SleepNoize have ads?

PeakflowLogger shows ads; SleepNoize does not.

### Which is updated more often, PeakflowLogger or SleepNoize?

PeakflowLogger ships an update weekly, and SleepNoize monthly. Most recently, PeakflowLogger was updated on October 19, 2026 and SleepNoize on October 22, 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.*