# Seneca Letters vs Mastermind

The clearest difference is in-app purchases: Mastermind at none against Seneca Letters's 3. Mastermind also leads on update cadence (daily vs weekly) and iOS requirement (13.4 vs 16.4). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Seneca Letters sells 3 one-off in-app purchases. Mastermind asks for nothing beyond the download.

Seneca Letters ships an update weekly, Mastermind daily. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Seneca Letters | Mastermind |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (6 ratings)](https://appshunter.io/ios/app/mastermind-stoic-joy-and-bliss/id6478835768/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Daily** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 10 MB | 27 MB |
| Requires iOS | 16.4 | **13.4** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Volodymyr Starovoitenko](https://appshunter.io/developer/1642489207) | [Elvis Baltais](https://appshunter.io/developer/1687362188) |

## What reviewers say

### Seneca Letters

[App page](https://appshunter.io/ios/app/seneca-letters/id1661854159)

Explore the wisdom of ancient Stoicism with "Moral Letters to Lucilius." This offline app offers 124 letters from Seneca, providing guidance for a morally correct life. Save favorites and take notes with export functionality.

**Highlights:** 124 "Moral Letters to Lucilius", Primary source of Stoicism, Offline access, Minimalistic design, Favorites list, Note-taking with export

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Great support | $0.99 | one-time |
| Mega support | $3.99 | one-time |
| Super support | $8.99 | one-time |


### Mastermind

[App page](https://appshunter.io/ios/app/mastermind-stoic-joy-and-bliss/id6478835768)

This app offers a sanctuary for mental well-being, providing curated exercises to reduce anxiety, alleviate depression, and conquer insomnia. Explore tailored categories and a comprehensive exercise collection to nurture your mind and reclaim joy.

**Highlights:** Anxiety reduction exercises, Depression alleviation tools, Insomnia relief techniques, Guided meditations, Mindful breathing exercises, Mood-boosting activities, Sleep improvement rituals

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Seneca Letters free?

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

### Is Mastermind free?

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

### Do Seneca Letters or Mastermind have ads?

Neither Seneca Letters nor Mastermind shows ads.

### Which is updated more often, Seneca Letters or Mastermind?

Seneca Letters ships an update weekly, and Mastermind daily. Most recently, Seneca Letters was updated on November 3, 2026 and Mastermind on November 4, 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.*