# Fast Energy ! vs Introvert Diary

The clearest difference is price: Fast Energy ! at Free against Introvert Diary's $0.99. Fast Energy ! also leads on iOS requirement (13.0 vs 18.0). Introvert Diary's advantage is ads (none vs shown) and update cadence (every 4 days vs every 5 weeks). On in-app purchases and device support there is nothing between them.

Fast Energy ! is free to download; Introvert Diary costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Fast Energy ! ships an update every 5 weeks, Introvert Diary every 4 days. The most recent releases landed on July 3, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Fast Energy ! | Introvert Diary |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.4 (12 ratings)](https://appshunter.io/ios/app/fast-energy/id1532063002/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 76.3% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 4 days** |
| Monetization | Ad-supported | — |
| Size | 91 MB | 2 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [CHAINA TEKHNOLODZHYS, TOV](https://appshunter.io/developer/1610982475) | [Igor Konoval](https://appshunter.io/developer/1011763987) |

## What reviewers say

### Fast Energy !

[App page](https://appshunter.io/ios/app/fast-energy/id1532063002)

Rent a portable power bank from stations worldwide to charge your devices on the go. Locate stations on a map, scan a QR code to rent, and return it at any station globally. Earn bonuses and benefit from a loyalty program.

**Highlights:** Find rental stations on map, Get directions to stations, Scan QR code to rent, Bonuses and loyalty program, Return power bank anywhere

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

**In-app purchases:** none

**What reviewers like**

- 👍 Convenient and easy to use app
- 🚀 Fast and efficient service
- 🗺️ Wide availability of power banks
- 💡 Solves battery issues
- 💰 Reasonable prices

**What reviewers complain about**

- 🔋 Power banks turn off early
- 🐛 Charging issues
- 💸 Unexpected charges
- ❌ Poor customer support
- 🚫 Difficulty with profile access

**Reported bugs**

- SMS confirmation not received
- App does not work for registration
- Submit button not working
- Cannot link some bank cards
- Unable to make payment through Apple Pay

**Requested features**

- Add Apple Pay support
- Implement wireless chargers


### Introvert Diary

[App page](https://appshunter.io/ios/app/introvert-diary/id6779727010)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fast Energy ! free?

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

### Is Introvert Diary free?

Introvert Diary costs $0.99, with no in-app purchases.

### Do Fast Energy ! or Introvert Diary have ads?

Fast Energy ! shows ads; Introvert Diary does not.

### Which is updated more often, Fast Energy ! or Introvert Diary?

Fast Energy ! ships an update every 5 weeks, and Introvert Diary every 4 days. Most recently, Fast Energy ! was updated on July 3, 2026 and Introvert Diary on September 15, 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.*