# SleepImage vs IntervalSmith

The clearest difference is in-app purchases: SleepImage at none against IntervalSmith's 1. IntervalSmith's advantage is update cadence (every 5 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. IntervalSmith sells 1 one-off in-app purchase. SleepImage asks for nothing beyond the download.

SleepImage ships an update monthly, IntervalSmith every 5 days. The most recent releases landed on November 3, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SleepImage | IntervalSmith |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (186 ratings)](https://appshunter.io/ios/app/sleepimage/id1504760736/reviews)** | — |
| Number of ratings | **186** | — |
| Positive reviews | 30.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Free | — |
| Size | 27 MB | 3 MB |
| Requires iOS | **16.0** | 17.6 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [SleepImage](https://appshunter.io/developer/1504760405) | [Frank Fattizzi](https://appshunter.io/developer/1059014622) |

## What reviewers say

### SleepImage

[App page](https://appshunter.io/ios/app/sleepimage/id1504760736)

This app records, transfers, and analyzes sleep quality data when paired with specific devices. It offers a simple, intuitive experience for understanding sleep diagnostics and empowering better health decisions. It is designed for reliability and accuracy, turning complex sleep information into actionable insights.

**Highlights:** Record sleep quality data, Transfer sleep data, Analyze sleep quality, Pair with SleepImage devices, Intuitive user experience, Actionable sleep insights

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easiest apnea testing method
- 👍 Comfortable and least obstructive
- 👍 Simple to use
- 👍 Game changer sleep study
- 👍 Excellent device

**What reviewers complain about**

- 🐛 Error messages on patient ID entry
- 🐛 Device disconnects frequently
- 🐛 Uploads get stuck
- 🐛 Data not received by clinic
- 🐛 Confusing setup instructions

**Reported bugs**

- Error messages when entering patient ID
- Device disconnects
- Uploads get stuck
- Data not received by sleep clinic
- App doesn't work on newer iPhones/Android

**Requested features**

- Notification for Bluetooth disconnection
- Notification for recording stoppage
- App continues to collect and sync data when closed
- Option to bypass email sign-up
- Improved customer service


### IntervalSmith

[App page](https://appshunter.io/ios/app/intervalsmith/id6808835732)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IntervalSmith Pro | $4.99 | one-time |


## Frequently asked questions

### Is SleepImage free?

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

### Is IntervalSmith free?

IntervalSmith is free to download, with in-app purchases available.

### Do SleepImage or IntervalSmith have ads?

Neither SleepImage nor IntervalSmith shows ads.

### Which is updated more often, SleepImage or IntervalSmith?

SleepImage ships an update monthly, and IntervalSmith every 5 days. Most recently, SleepImage was updated on November 3, 2026 and IntervalSmith on October 24, 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.*