# Thoughts by OPTEN vs Streak Stack

Thoughts by OPTEN and Streak Stack are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Thoughts by OPTEN ships an update every 9 days, Streak Stack fortnightly. The most recent releases landed on October 10, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Thoughts by OPTEN | Streak Stack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/thoughts-by-opten/id6590626917/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Fortnightly |
| Monetization | Free | — |
| Size | 38 MB | 34 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OPTEN AG](https://appshunter.io/developer/1478298365) | [Sergio Vazquez](https://appshunter.io/developer/1807606896) |

## What reviewers say

### Thoughts by OPTEN

[App page](https://appshunter.io/ios/app/thoughts-by-opten/id6590626917)

Effortlessly transform spoken thoughts into text using advanced AI. This tool ensures you never miss an idea, even when you're on the move, by converting voice notes into written messages sent directly to your email.

**Highlights:** Capture ideas quickly, AI voice conversion, Send directly to email, Minimize driving distractions, Safe and efficient idea capture

**Features:** macOS Compatibility

**In-app purchases:** none


### Streak Stack

[App page](https://appshunter.io/ios/app/streak-stack-habit-tracker/id6776901355)

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

**In-app purchases:** none


## Frequently asked questions

### Is Thoughts by OPTEN free?

Thoughts by OPTEN is free to download, with no in-app purchases.

### Is Streak Stack free?

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

### Do Thoughts by OPTEN or Streak Stack have ads?

Neither Thoughts by OPTEN nor Streak Stack shows ads.

### Which is updated more often, Thoughts by OPTEN or Streak Stack?

Thoughts by OPTEN ships an update every 9 days, and Streak Stack fortnightly. Most recently, Thoughts by OPTEN was updated on October 10, 2026 and Streak Stack on October 9, 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.*