# tetrify vs BioField

The clearest difference is price: tetrify at Free against BioField's $8.99. tetrify also leads on update cadence (every 5 days vs every 11 days) and device support (4 vs 2). BioField's advantage is in-app purchases (none vs 5). On ads there is nothing between them.

tetrify is free to download; BioField costs $8.99 up front. tetrify sells 4 in-app purchases, starting at $1.99 per month. BioField asks for nothing beyond the download.

tetrify ships an update every 5 days, BioField every 11 days. The most recent releases landed on October 10, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | tetrify | BioField |
| --- | --- | --- |
| Price | **Free** | $8.99 |
| Rating | **[4.8 (58 ratings)](https://appshunter.io/ios/app/tetrify-text-yourself-notes/id6447967703/reviews)** | — |
| Number of ratings | **58** | — |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 11 days |
| Monetization | Free with in-app purchases | — |
| Size | 137 MB | 18 MB |
| Requires iOS | **13.0** | 18.5 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [tetr, LLC](https://appshunter.io/developer/1683133408) | [Daniel Balcazar](https://appshunter.io/developer/1826908875) |

## What reviewers say

### tetrify

[App page](https://appshunter.io/ios/app/tetrify-text-yourself-notes/id6447967703)

Capture to-dos, ideas, and track habits using a familiar texting interface. Turn any text into organized notes and reminders without complex menus. Designed for quick thought capture and personalized organization.

**Highlights:** Instant capture through chat, Smart Spaces for notes, tasks, journal, habits, Privacy-first and local data storage, Familiar chat interface, Cross-device sync via iCloud, Export notes to other apps

**Features:** Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| tetrify Pro | $1.99 | per month |
| tetrify Pro | $14.99 | per year |
| tetrify Pro | $14.99 | one-time |
| tetrify Offline | $19.99 | one-time |


### BioField

[App page](https://appshunter.io/ios/app/biofield/id6748662468)

**In-app purchases:** none


## Frequently asked questions

### Is tetrify free?

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

### Is BioField free?

BioField costs $8.99, with no in-app purchases.

### Do tetrify or BioField have ads?

Neither tetrify nor BioField shows ads.

### Which is updated more often, tetrify or BioField?

tetrify ships an update every 5 days, and BioField every 11 days. Most recently, tetrify was updated on October 10, 2026 and BioField on September 28, 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.*