# DV Numerus vs LetterRack

The clearest difference is price: LetterRack at Free against DV Numerus's $79.99. DV Numerus's advantage is iOS requirement (18.2 vs 26.4). On update cadence, ads, in-app purchases and device support there is nothing between them.

LetterRack is free to download; DV Numerus costs $79.99 up front. DV Numerus sells 2 one-off in-app purchases and LetterRack sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

DV Numerus ships an update every 5 weeks, LetterRack every 3 weeks. The most recent releases landed on October 5, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | DV Numerus | LetterRack |
| --- | --- | --- |
| Price | $79.99 | **Free** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Size | 7 MB | 28 MB |
| Requires iOS | **18.2** | 26.4 |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Marc Super](https://appshunter.io/developer/1792449328) | [Vincent Launay](https://appshunter.io/developer/1198218316) |

## What reviewers say

### DV Numerus

[App page](https://appshunter.io/ios/app/dv-numerus/id6743944866)

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Apple Watch Peek | $17.99 | one-time |
| Motherboard Integration | $49.99 | one-time |


### LetterRack

[App page](https://appshunter.io/ios/app/letterrack/id6764377699)

**Features:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Xtremagic Pass | $3.99 | per month |
| Xtremagic Pass | $24.99 | per year |
| Full Access (One-Time Purchase) | $7.99 | one-time |


## Frequently asked questions

### Is DV Numerus free?

DV Numerus costs $79.99, and also offers in-app purchases.

### Is LetterRack free?

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

### Do DV Numerus or LetterRack have ads?

Neither DV Numerus nor LetterRack shows ads.

### Which is updated more often, DV Numerus or LetterRack?

DV Numerus ships an update every 5 weeks, and LetterRack every 3 weeks. Most recently, DV Numerus was updated on October 5, 2026 and LetterRack on September 25, 2026.

---

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