# Letteris AI vs MirrorCaption

The clearest difference is update cadence: MirrorCaption at every 4 days against Letteris AI's every 2 months. Letteris AI's advantage is iOS requirement (16.6 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Letteris AI sells 3 one-off in-app purchases and MirrorCaption sells 7 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Letteris AI ships an update every 2 months, MirrorCaption every 4 days. The most recent releases landed on October 30, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Letteris AI | MirrorCaption |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/letteris-ai/id6751180011/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 32 MB | 6 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Amelix Solutions LLC](https://appshunter.io/developer/1849067951) | [Xueyun Qian](https://appshunter.io/developer/6806851324) |

## What reviewers say

### Letteris AI

[App page](https://appshunter.io/ios/app/letteris-ai/id6751180011)

Scan and securely store letters in iCloud. This app simplifies complex documents into easy-to-read notes and allows you to chat with your letters for instant clarity. Add due dates to your calendar and access your scanned documents anytime.

**Highlights:** Scan letters with phone camera, Secure iCloud storage, Document simplification, AI chat for document clarity, Calendar due date integration, Shareable PDF exports

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Letteris Credits $5 | $4.99 | one-time |
| Credits $10 Pack | $9.99 | one-time |
| Credits $20 Pack | $19.99 | one-time |


### MirrorCaption

[App page](https://appshunter.io/ios/app/mirrorcaption-interpreter-ai/id6806850738)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Unlimited Monthly | $34.99 | per month |
| Yearly | $49.99 | per year |
| Unlimited Yearly | $279.00 | per year |
| 15-Hour Voice Pack | $6.99 | one-time |
| 100-Hour Voice Pack | $49.99 | one-time |
| Premium | $89.99 | one-time |


## Frequently asked questions

### Is Letteris AI free?

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

### Is MirrorCaption free?

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

### Do Letteris AI or MirrorCaption have ads?

Neither Letteris AI nor MirrorCaption shows ads.

### Which is updated more often, Letteris AI or MirrorCaption?

Letteris AI ships an update every 2 months, and MirrorCaption every 4 days. Most recently, Letteris AI was updated on October 30, 2026 and MirrorCaption on November 6, 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.*