# speizers vs Blackout Math.Power Calculator

The clearest difference is in-app purchases: speizers at none against Blackout Math.Power Calculator's 1. speizers also leads on iOS requirement (12.4 vs 18). Blackout Math.Power Calculator's advantage is update cadence (weekly vs fortnightly). On price, ads and device support there is nothing between them.

Both are free to download. Blackout Math.Power Calculator sells 1 one-off in-app purchase. speizers asks for nothing beyond the download.

speizers ships an update fortnightly, Blackout Math.Power Calculator weekly. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | speizers | Blackout Math.Power Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (5 ratings)](https://appshunter.io/ios/app/blackout-mathpower-calculator/id6755345214/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | — | Free |
| Size | 26 MB | 10 MB |
| Requires iOS | **12.4** | 18 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [PAL TIBOR BALINT](https://appshunter.io/developer/1693133770) | [Yevheniia Borunova](https://appshunter.io/developer/1684316852) |

## What reviewers say

### speizers

[App page](https://appshunter.io/ios/app/speizers/id6450397879)

**Features:** macOS Compatibility

**In-app purchases:** none


### Blackout Math.Power Calculator

[App page](https://appshunter.io/ios/app/blackout-mathpower-calculator/id6755345214)

This app helps you accurately calculate power outage durations and battery performance. It factors in real-world conditions like battery discharge, inverter efficiency, and device consumption to provide realistic estimates for runtime and charging.

**Highlights:** Calculate usable battery energy (Wh/kWh), Factor in safe depth of discharge, Account for inverter efficiency and losses, Calculate real device energy consumption, Estimate actual device runtime, Provide accurate battery charging time estimates, Explain complex energy concepts clearly

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $7.99 | one-time |


## Frequently asked questions

### Is speizers free?

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

### Is Blackout Math.Power Calculator free?

Blackout Math.Power Calculator is free to download, with in-app purchases available.

### Do speizers or Blackout Math.Power Calculator have ads?

Neither speizers nor Blackout Math.Power Calculator shows ads.

### Which is updated more often, speizers or Blackout Math.Power Calculator?

speizers ships an update fortnightly, and Blackout Math.Power Calculator weekly. Most recently, speizers was updated on October 27, 2026 and Blackout Math.Power Calculator on October 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.*