# Voltie vs Letter Explainer

The clearest difference is in-app purchases: Voltie at none against Letter Explainer's 3. Voltie also leads on device support (3 vs 1). Letter Explainer's advantage is update cadence (every 4 days vs every 3 weeks). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Letter Explainer sells 3 in-app purchases, starting at $3.99 per month. Voltie asks for nothing beyond the download.

Voltie ships an update every 3 weeks, Letter Explainer every 4 days. The most recent releases landed on October 16, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Voltie | Letter Explainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Size | 48 MB | 21 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Voltie Kft.](https://appshunter.io/developer/1690550740) | [Armen Ter-Oganezov](https://appshunter.io/developer/1723150483) |

## What reviewers say

### Voltie

[App page](https://appshunter.io/ios/app/voltie/id6449769010)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Letter Explainer

[App page](https://appshunter.io/ios/app/letter-explainer-postklar/id6816644992)

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Postklar Pro Monthly | $3.99 | per month |
| Postklar Pro Yearly | $24.99 | per year |
| 5 Scans | $2.99 | one-time |


## Frequently asked questions

### Is Voltie free?

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

### Is Letter Explainer free?

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

### Do Voltie or Letter Explainer have ads?

Neither Voltie nor Letter Explainer shows ads.

### Which is updated more often, Voltie or Letter Explainer?

Voltie ships an update every 3 weeks, and Letter Explainer every 4 days. Most recently, Voltie was updated on October 16, 2026 and Letter Explainer on October 19, 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.*