# CarbSync vs Phase

The clearest difference is in-app purchases: CarbSync at none against Phase's 6. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Phase sells 6 in-app purchases, starting at $0.99 per 7 days. CarbSync asks for nothing beyond the download.

## The numbers

| Metric | CarbSync | Phase |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/phase-sleep-schedule-reset/id6759457939/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 weeks |
| Monetization | — | Free |
| Size | 4 MB | 32 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [文权 刘](https://appshunter.io/developer/1874766464) | [Youssef Ismaili](https://appshunter.io/developer/1696488085) |

## What reviewers say

### CarbSync

[App page](https://appshunter.io/ios/app/carbsync-macro-tracker/id6758784101)

**Features:** macOS Compatibility

**In-app purchases:** none


### Phase

[App page](https://appshunter.io/ios/app/phase-sleep-schedule-reset/id6759457939)

This app guides you through a personalized daily plan to gradually shift your sleep schedule. It provides timed nudges based on your local sunrise and sunset to help you achieve your desired bedtime and wake-up times.

**Highlights:** Personalized day-by-day sleep schedule, Science-backed daily nudges, Multiple sleep programs for different needs, Location-aware sunrise/sunset sync, Offline functionality, HealthKit integration, Home and Lock Screen widgets

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Phase Pro | $0.99 | per 7 days |
| Phase Pro | $5.99 | per year |
| Lifetime Phase Pro | $1.99 | one-time |
| Pro | $2.99 | one-time |
| Lifetime Pro | $4.99 | one-time |
| Phase Pro | $9.99 | one-time |


## Frequently asked questions

### Is CarbSync free?

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

### Is Phase free?

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

### Do CarbSync or Phase have ads?

Neither CarbSync nor Phase shows ads.

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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.*