# NormalClock vs AircraftPower S

The clearest difference is review sentiment: AircraftPower S at 100% against NormalClock's 50%. AircraftPower S also leads on price (Free vs $0.99) and rating (5.0 vs 1.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

AircraftPower S is free to download; NormalClock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

AircraftPower S holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: AircraftPower S has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of NormalClock's written reviews are positive against 100% of AircraftPower S's.

NormalClock ships an update every 10 months, AircraftPower S every 6 months. The most recent releases landed on October 15, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | NormalClock | AircraftPower S |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/normalclock/id382249419/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/aircraftpower-s/id1671252596/reviews)** |
| Number of ratings | 1 | **5** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 6 months** |
| Monetization | Paid | **Free** |
| Size | 3 MB | 2 MB |
| Requires iOS | 15.0 | **13.5** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [r2r660cc](https://appshunter.io/developer/372976464) | [James Petty](https://appshunter.io/developer/603661046) |

## What reviewers say

### NormalClock

[App page](https://appshunter.io/ios/app/normalclock/id382249419)

This utility app functions as a basic clock with alarm features. It allows customization of alarm sounds using iPod library tunes and includes a screen burn-in prevention mechanism by slightly shifting the clock's position.

**Highlights:** Customizable alarm sounds, iPod library integration for alarm tunes, Screen burn-in prevention, Alarm on/off functionality, Alarm time setting

**In-app purchases:** none


### AircraftPower S

[App page](https://appshunter.io/ios/app/aircraftpower-s/id1671252596)

This app calculates and displays the performance of numerous Continental and Lycoming aircraft engine models. It offers a graphic display illustrating manual construction methods for determining altitude performance, with adjustable input values and unit preferences.

**Highlights:** Calculates performance for 74 Continental and 107 Lycoming engine models, Graphic display of engine performance charts, Illustrates manual altitude performance construction methods, Adjustable input values for manifold pressure, RPM, altitude, and temperature, Choice of English or metric units, Selectable default input values and engine models

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NormalClock free?

NormalClock costs $0.99, with no in-app purchases.

### Is AircraftPower S free?

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

### Which has better reviews, NormalClock or AircraftPower S?

AircraftPower S is rated higher. NormalClock averages 1.0 out of 5 from 1 ratings, while AircraftPower S averages 5.0 from 5 ratings.

### Do NormalClock or AircraftPower S have ads?

Neither NormalClock nor AircraftPower S shows ads.

### Which is updated more often, NormalClock or AircraftPower S?

NormalClock ships an update every 10 months, and AircraftPower S every 6 months. Most recently, NormalClock was updated on October 15, 2026 and AircraftPower S on October 7, 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.*