# Zappy US vs SYNC

The clearest difference is iOS requirement: Zappy US at 13.0 against SYNC's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Zappy US ships an update every 2 months, SYNC every 4 months. The most recent releases landed on November 4, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Zappy US | SYNC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (10 ratings)](https://appshunter.io/ios/app/zappy-us/id6472009480/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free | — |
| Size | 120 MB | 54 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 9+ | 17+ |
| Developer | [Needzappy USA Inc.](https://appshunter.io/developer/1716467753) | [Meherzan Turel](https://appshunter.io/developer/1876636206) |

## What reviewers say

### Zappy US

[App page](https://appshunter.io/ios/app/zappy-us/id6472009480)

Rent a portable power bank to keep your devices charged while you're out and about. Never worry about a dead battery again and enjoy your day without interruption.

**Highlights:** Rent portable power banks, Charge devices on the go, Shared power bank network, Enjoy uninterrupted day

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

**In-app purchases:** none


### SYNC

[App page](https://appshunter.io/ios/app/sync-closer-everyday/id6759068606)

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

**In-app purchases:** none


## Frequently asked questions

### Is Zappy US free?

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

### Is SYNC free?

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

### Do Zappy US or SYNC have ads?

Neither Zappy US nor SYNC shows ads.

### Which is updated more often, Zappy US or SYNC?

Zappy US ships an update every 2 months, and SYNC every 4 months. Most recently, Zappy US was updated on November 4, 2026 and SYNC on October 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*