# Firefly Glow vs SecondBrain

The clearest difference is ads: Firefly Glow at none against SecondBrain's shown. SecondBrain's advantage is update cadence (every 3 days vs fortnightly) and device support (3 vs 1). On price and in-app purchases there is nothing between them.

Both are free to download. Firefly Glow sells 3 in-app purchases, starting at $0.99 per month and SecondBrain sells 3 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

Firefly Glow ships an update fortnightly, SecondBrain every 3 days. The most recent releases landed on September 21, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Firefly Glow | SecondBrain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/secondbrain-ai-memory/id6762130376/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 3 days** |
| Monetization | — | Free with in-app purchases |
| Size | 63 MB | 72 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [南 张](https://appshunter.io/developer/1867992587) | [Federico Cesarini](https://appshunter.io/developer/1888767256) |

## What reviewers say

### Firefly Glow

[App page](https://appshunter.io/ios/app/firefly-glow/id6758776763)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Firefly Glow | $0.99 | per month |
| Firefly Glow | $4.99 | per year |
| Firefly Glow (Lifetime) | $9.99 | one-time |


### SecondBrain

[App page](https://appshunter.io/ios/app/secondbrain-ai-memory/id6762130376)

This app automatically transcribes, titles, and files your spoken thoughts, creating a self-organizing note system. It can convert voice notes into calendar events, provide daily summaries, and allow you to chat with your saved information.

**Highlights:** Automatic transcription and titling, AI-powered self-organizing notes, Voice to calendar event creation, Daily morning briefing summaries, Chat with your notes for answers, 3D brain graph visualization, Full-text search, Cross-app sharing

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SecondBrain Pro | $8.99 | per month |
| SecondBrain Pro Yearly | $34.99 | per year |
| SecondBrain Pro Yearly | $44.99 | per year |


## Frequently asked questions

### Is Firefly Glow free?

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

### Is SecondBrain free?

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

### Do Firefly Glow or SecondBrain have ads?

SecondBrain shows ads; Firefly Glow does not.

### Which is updated more often, Firefly Glow or SecondBrain?

Firefly Glow ships an update fortnightly, and SecondBrain every 3 days. Most recently, Firefly Glow was updated on September 21, 2026 and SecondBrain on September 24, 2026.

---

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