# VOLDT vs Letter Explainer

The clearest difference is in-app purchases: VOLDT at none against Letter Explainer's 3. VOLDT also leads on iOS requirement (14.0 vs 17.0). Letter Explainer's advantage is update cadence (every 4 days vs every 11 months). On price, ads and device support there is nothing between them.

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

VOLDT ships an update every 11 months, Letter Explainer every 4 days. The most recent releases landed on October 4, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | VOLDT | Letter Explainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 4 days** |
| Size | 173 MB | 21 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Voldt B.V.](https://appshunter.io/developer/1896401717) | [Armen Ter-Oganezov](https://appshunter.io/developer/1723150483) |

## What reviewers say

### VOLDT

[App page](https://appshunter.io/ios/app/voldt/id6736854768)

**Features:** 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 VOLDT free?

VOLDT 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 VOLDT or Letter Explainer have ads?

Neither VOLDT nor Letter Explainer shows ads.

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

VOLDT ships an update every 11 months, and Letter Explainer every 4 days. Most recently, VOLDT was updated on October 4, 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.*