# PrincipleX vs TrueBird

The clearest difference is in-app purchases: TrueBird at none against PrincipleX's 5. TrueBird also leads on update cadence (every 2 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PrincipleX sells 5 in-app purchases, starting at $2.99 per month. TrueBird asks for nothing beyond the download.

PrincipleX ships an update every 3 weeks, TrueBird every 2 days. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | PrincipleX | TrueBird |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/principlex-principles-and-notes/id6479702612/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Monetization | Paid | — |
| Size | 7 MB | 7 MB |
| Requires iOS | **18.0** | 18.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [旭 夏](https://appshunter.io/developer/1494807611) | [YoungWon Studio](https://appshunter.io/developer/1890371737) |

## What reviewers say

### PrincipleX

[App page](https://appshunter.io/ios/app/principlex-principles-and-notes/id6479702612)

Capture, reflect on, and grow with your personal principles. This app helps you organize your guiding beliefs and build the habit of living by them through daily reminders and journaling.

**Highlights:** Create and organize personal principles, Manage principles with folders and tags, Daily principle practice reminders, Reflective journaling for personal growth, Pin important principles for daily focus, iCloud sync across devices

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $2.99 | per month |
| Annual Plan | $14.99 | per year |
| A Coffee | $1.00 | one-time |
| Signature Color | $3.00 | one-time |
| Lifetime Access | $9.99 | one-time |


### TrueBird

[App page](https://appshunter.io/ios/app/truebird-quote-keeper/id6800512566)

**In-app purchases:** none


## Frequently asked questions

### Is PrincipleX free?

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

### Is TrueBird free?

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

### Do PrincipleX or TrueBird have ads?

Neither PrincipleX nor TrueBird shows ads.

### Which is updated more often, PrincipleX or TrueBird?

PrincipleX ships an update every 3 weeks, and TrueBird every 2 days. Most recently, PrincipleX was updated on October 24, 2026 and TrueBird on October 16, 2026.

---

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