# 闪念Spark vs Thought_Box

The clearest difference is in-app purchases: Thought_Box at none against 闪念Spark's 1. Thought_Box also leads on iOS requirement (18.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 闪念Spark sells 1 one-off in-app purchase. Thought_Box asks for nothing beyond the download.

闪念Spark ships an update every 8 days, Thought_Box weekly. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | 闪念Spark | Thought_Box |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 8 days | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 362 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Weiqing Lin](https://appshunter.io/developer/6811265748) | [洋 钟](https://appshunter.io/developer/6794950726) |

## What reviewers say

### 闪念Spark

[App page](https://appshunter.io/ios/app/spark/id6811265746)

Capture fleeting thoughts instantly with voice or text. This app prioritizes speed and simplicity, offering offline transcription and seamless export to Obsidian. Enhance your notes with AI-powered text refinement.

**Highlights:** Instant voice recording and transcription, Offline transcription on device, Lock screen widget for quick capture, Automatic saving, Full-text search, Export to Obsidian (Markdown), AI-powered text refinement (in-app purchase)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Spark Notes | $2.99 | one-time |


### Thought_Box

[App page](https://appshunter.io/ios/app/thought-box/id6811530555)

**Features:** iPhone Duo support

**In-app purchases:** none


## Frequently asked questions

### Is 闪念Spark free?

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

### Is Thought_Box free?

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

### Do 闪念Spark or Thought_Box have ads?

Neither 闪念Spark nor Thought_Box shows ads.

### Which is updated more often, 闪念Spark or Thought_Box?

闪念Spark ships an update every 8 days, and Thought_Box weekly. Most recently, 闪念Spark was updated on October 31, 2026 and Thought_Box on November 10, 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.*