# DEEP vs Cal Smart

The clearest difference is update cadence: DEEP at every 5 days against Cal Smart's monthly. Cal Smart's advantage is iOS requirement (15.5 vs 17.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. DEEP sells 3 in-app purchases, starting at $4.99 per month and Cal Smart sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for DEEP against 5.0 for Cal Smart. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

DEEP ships an update every 5 days, Cal Smart monthly. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | DEEP | Cal Smart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/deep-sleep-train-eat/id6467652677/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/cal-smart/id6737219020/reviews) |
| Number of ratings | 3 | **4** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Monthly |
| Monetization | Free with in-app purchases | Freemium |
| Size | 163 MB | 135 MB |
| Requires iOS | 17.0 | **15.5** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Sparrow InterActive](https://appshunter.io/developer/1493453668) | [Jienan Yao](https://appshunter.io/developer/994410104) |

## What reviewers say

### DEEP

[App page](https://appshunter.io/ios/app/deep-sleep-train-eat/id6467652677)

This app uses pink noise, sleep coaching, and personalized tracking to help you fall asleep faster, sleep deeper, and wake up feeling restored. It analyzes your Apple Watch data to provide insights and offers guided coaching for better sleep habits.

**Highlights:** Advanced sleep analytics (HRV, heart rate dip, sleep cycles), Sleep sounds and noise masking (pink noise, white noise), Guided sleep coaching with science-based tips, Sleep onset tracking and latency reduction, Intuitive sleep insights and recovery tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Yearly | $34.99 | per year |
| Lifetime Access | $149.00 | one-time |


### Cal Smart

[App page](https://appshunter.io/ios/app/cal-smart/id6737219020)

Instantly analyze meals by taking a photo to get calorie and macronutrient breakdowns. Receive personalized health advice and track workouts for a holistic approach to wellness. View weekly reports to monitor progress and make informed dietary choices.

**Highlights:** Photo-based nutrient recognition, Personalized health advice, Integrated workout tracking, Weekly health reports, Simple and intuitive interface, Comprehensive health tracking

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cal Smart Membership | $1.99 | per 7 days |
| Cal Smart Membership | $6.99 | per month |
| Cal Smart Membership | $24.99 | per year |


## Frequently asked questions

### Is DEEP free?

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

### Is Cal Smart free?

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

### Which has better reviews, DEEP or Cal Smart?

DEEP and Cal Smart are both rated 5.0 out of 5 on the App Store, from 3 and 4 ratings respectively.

### Do DEEP or Cal Smart have ads?

Neither DEEP nor Cal Smart shows ads.

### Which is updated more often, DEEP or Cal Smart?

DEEP ships an update every 5 days, and Cal Smart monthly. Most recently, DEEP was updated on October 13, 2026 and Cal Smart on October 8, 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.*