# Let's Sync vs Keywave

The clearest difference is in-app purchases: Keywave at none against Let's Sync's 10. Let's Sync's advantage is review sentiment (67% vs 33%) and update cadence (monthly vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Let's Sync sells 10 one-off in-app purchases. Keywave asks for nothing beyond the download.

Let's Sync ships an update monthly, Keywave every 4 months. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Let's Sync | Keywave |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **66.7% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 92 MB | 13 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Terra Virgo Corporation](https://appshunter.io/developer/906339963) | [William Kelley](https://appshunter.io/developer/1870645864) |

## What reviewers say

### Let's Sync

[App page](https://appshunter.io/ios/app/lets-sync/id1350450913)

Synchronize audio across multiple smartphones for shared listening experiences. Create events for silent dances, interactive stories, group workouts, and more. It's a versatile platform for personal and business use, supporting thousands of concurrent participants.

**Highlights:** Synchronizes audio across multiple smartphones, Creates shared listening events, Supports silent dances and interactive stories, Enables group workouts and worldwide events, Platform for unique business ventures, Supports up to 7,000 concurrent participants

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add 5 credits to wallet | $4.99 | one-time |
| Add 21 credits to wallet | $20.99 | one-time |
| Add 22 credits to wallet | $21.99 | one-time |
| Add 23 credits to wallet | $22.99 | one-time |
| Add 24 credits to wallet | $23.99 | one-time |
| Add 25 credits to wallet | $24.99 | one-time |
| Add 26 credits to wallet | $25.99 | one-time |
| Add 27 credits to wallet | $26.99 | one-time |
| Add 28 credits to wallet | $27.99 | one-time |
| Add 29 credits to wallet | $28.99 | one-time |


### Keywave

[App page](https://appshunter.io/ios/app/keywave-pgp-encryption/id6758056425)

This app provides robust PGP encryption and decryption capabilities directly on your device. It allows you to generate, manage, import, and export PGP keys locally, ensuring your data remains private and secure without server reliance.

**Highlights:** Encrypt and decrypt messages, Generate PGP keys (2048-4096 bit), Manage unlimited local keys, Import keys from files or clipboard, Export keys in various formats, 100% local processing, Zero data collection

**In-app purchases:** none


## Frequently asked questions

### Is Let's Sync free?

Let's Sync is free to download, with in-app purchases available.

### Is Keywave free?

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

### Do Let's Sync or Keywave have ads?

Neither Let's Sync nor Keywave shows ads.

### Which is updated more often, Let's Sync or Keywave?

Let's Sync ships an update monthly, and Keywave every 4 months. Most recently, Let's Sync was updated on November 2, 2026 and Keywave on November 5, 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.*