# PrincipleX vs Digital Energy

The clearest difference is in-app purchases: Digital Energy at none against PrincipleX's 5. Digital Energy also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On price, update cadence and ads there is nothing between them.

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

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 21, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | PrincipleX | Digital Energy |
| --- | --- | --- |
| 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 3 weeks |
| Monetization | Paid | — |
| Size | 7 MB | 346 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [旭 夏](https://appshunter.io/developer/1494807611) | [Hangzhou dongzi information technology](https://appshunter.io/developer/1803507461) |

## 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 |


### Digital Energy

[App page](https://appshunter.io/ios/app/digital-energy/id6743580787)

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

**In-app purchases:** none


## Frequently asked questions

### Is PrincipleX free?

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

### Is Digital Energy free?

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

### Do PrincipleX or Digital Energy have ads?

Neither PrincipleX nor Digital Energy shows ads.

### Which is updated more often, PrincipleX or Digital Energy?

PrincipleX ships an update every 3 weeks, and Digital Energy every 3 weeks. Most recently, PrincipleX was updated on October 21, 2026 and Digital Energy on October 11, 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.*