# Contacts Sync Pro vs StoneFlow

The clearest difference is price: StoneFlow at Free against Contacts Sync Pro's $9.99. Contacts Sync Pro's advantage is chart position (#123 vs unranked) and device support. On in-app purchases and iOS requirement there is nothing between them.

StoneFlow is free to download; Contacts Sync Pro costs $9.99 up front. Contacts Sync Pro sells 4 one-off in-app purchases and StoneFlow sells 1 in-app purchase, starting at $39.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Contacts Sync Pro | StoneFlow |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.7 (802 ratings)](https://appshunter.io/ios/app/contacts-sync-pro/id686378579/reviews)** | — |
| Number of ratings | **802** | — |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | — |
| Update frequency | Every 3 months | — |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#123** | — |
| Size | 44 MB | 1 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | **iPhone, iPad** | — |
| Age rating | 4+ | 12+ |
| Developer | [Playa Apps](https://appshunter.io/developer/449814913) | [Reon Coetzee](https://appshunter.io/developer/1891785462) |

## What reviewers say

### Contacts Sync Pro

[App page](https://appshunter.io/ios/app/contacts-sync-pro/id686378579)

**Currently charting:** #123 Top Paid · Productivity (US App Store)

Effortlessly synchronize your contacts across Google, iCloud, and Outlook. This reliable app ensures your contact information is up-to-date on your iPhone, supporting two-way syncing and preserving all contact details and groups.

**Highlights:** Sync Google, iCloud, and Outlook contacts, Two-way and one-way sync options, Syncs all contact fields and photos, Preserves Google labels and Outlook categories, Automatic background syncing, Duplicate contact elimination, Confirm changes before syncing

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Syncs | Free | one-time |
| Automatic Contact Syncing | Free | one-time |
| Make Contribution | $4.99 | one-time |
| Make Larger Contribution | $9.99 | one-time |

**What reviewers like**

- 🚀 Works flawlessly
- 👍 Easy to use
- 🚀 Reliable and accurate
- 🚀 Keeps contacts in sync
- 👍 Excellent responsiveness from developer

**What reviewers complain about**

- 🐛 UX has subtly changed for the worse
- 🐛 Confusing to use for just syncing one contact
- 🐛 Doesn't sync Gmail groups

**Reported bugs**

- Caused massive increase in number of contacts
- Eliminated all existing contacts

**Requested features**

- Improved handling of duplicate contacts
- Better side-by-side comparison of contacts


### StoneFlow

[App page](https://appshunter.io/ios/app/stoneflow/id6761858408)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| StoneFlow Monthly | $39.99 | per month |


## Frequently asked questions

### Is Contacts Sync Pro free?

Contacts Sync Pro costs $9.99, and also offers in-app purchases.

### Is StoneFlow free?

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

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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.*