# BlitzRechner vs Lightning Tracker & Thunder

The clearest difference is in-app purchases: Lightning Tracker & Thunder at none against BlitzRechner's 3. Lightning Tracker & Thunder also leads on update cadence (every 5 days vs every 4 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. BlitzRechner sells 3 one-off in-app purchases. Lightning Tracker & Thunder asks for nothing beyond the download.

BlitzRechner ships an update every 4 weeks, Lightning Tracker & Thunder every 5 days. The most recent releases landed on September 29, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | BlitzRechner | Lightning Tracker & Thunder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 5 days** |
| Size | 2 MB | 44 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Christopher Fuchs](https://appshunter.io/developer/1654565548) | [Feynman EinsteinAI Note Taker OU](https://appshunter.io/developer/1782064427) |

## What reviewers say

### BlitzRechner

[App page](https://appshunter.io/ios/app/blitzrechner/id6446580439)

**Features:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Brötchen | $1.99 | one-time |
| Pommes | $3.99 | one-time |
| Döner | $6.99 | one-time |


### Lightning Tracker & Thunder

[App page](https://appshunter.io/ios/app/lightning-tracker-and-thunder/id6797213318)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is BlitzRechner free?

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

### Is Lightning Tracker & Thunder free?

Lightning Tracker & Thunder is free to download, with no in-app purchases.

### Do BlitzRechner or Lightning Tracker & Thunder have ads?

Neither BlitzRechner nor Lightning Tracker & Thunder shows ads.

### Which is updated more often, BlitzRechner or Lightning Tracker & Thunder?

BlitzRechner ships an update every 4 weeks, and Lightning Tracker & Thunder every 5 days. Most recently, BlitzRechner was updated on September 29, 2026 and Lightning Tracker & Thunder on October 14, 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.*