# Power Reserve vs Önemli Günler

The clearest difference is update cadence: Önemli Günler at every 2 weeks against Power Reserve's every 9 months. Power Reserve's advantage is iOS requirement (11.0 vs 15). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Power Reserve ships an update every 9 months, Önemli Günler every 2 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Power Reserve | Önemli Günler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/power-reserve/id1577785272/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 23 MB | 44 MB |
| Requires iOS | **11.0** | 15 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kohler Co.](https://appshunter.io/developer/433969499) | [Fatih NALCI](https://appshunter.io/developer/1825880026) |

## What reviewers say

### Power Reserve

[App page](https://appshunter.io/ios/app/power-reserve/id1577785272)

Monitor your solar power energy system remotely. View usage history and optimize energy output by selecting different operational modes like backup power, self-supply, or time of use.

**Highlights:** Remote system monitoring, Usage history tracking, Mode selection (backup, self-supply, time of use), Solar power optimization, Anytime, anywhere access

**Features:** macOS Compatibility

**In-app purchases:** none


### Önemli Günler

[App page](https://appshunter.io/ios/app/onemli-gunler/id6748543777)

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

**In-app purchases:** none


## Frequently asked questions

### Is Power Reserve free?

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

### Is Önemli Günler free?

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

### Do Power Reserve or Önemli Günler have ads?

Neither Power Reserve nor Önemli Günler shows ads.

### Which is updated more often, Power Reserve or Önemli Günler?

Power Reserve ships an update every 9 months, and Önemli Günler every 2 weeks. Most recently, Power Reserve was updated on November 3, 2026 and Önemli Günler on October 30, 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.*