# Phenol55 vs TruAirspeed

The clearest difference is update cadence: Phenol55 at every 2 months against TruAirspeed's every 24 months. Phenol55 also leads on rating (4.3 vs 4.1). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

Phenol55 holds the better App Store score, 4.3 against 4.1. Both are backed by a comparable volume of ratings — 6 and 8 respectively.

Phenol55 ships an update every 2 months, TruAirspeed every 24 months. The most recent releases landed on September 16, 2026 and June 2, 2026 respectively.

## The numbers

| Metric | Phenol55 | TruAirspeed |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/phenol55/id593701823/reviews)** | [4.1 (8 ratings)](https://appshunter.io/ios/app/truairspeed/id855269892/reviews) |
| Number of ratings | 6 | **8** |
| Positive reviews | — | 71.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 24 months |
| Monetization | Free | Free |
| Size | 49 MB | 8 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Riverbend](https://appshunter.io/developer/593701826) | [James Petty](https://appshunter.io/developer/603661046) |

## What reviewers say

### Phenol55

[App page](https://appshunter.io/ios/app/phenol55/id593701823)

Manage your wine collection from your iOS device. View detailed bottle information, read or write tasting notes, and schedule pickups or deliveries. This app is exclusively for members cellaring wine with the service.

**Highlights:** Manage wine collection, View bottle images, Read tasting notes, Write tasting notes, Schedule pickup/delivery

**Features:** macOS Compatibility

**In-app purchases:** none


### TruAirspeed

[App page](https://appshunter.io/ios/app/truairspeed/id855269892)

This utility calculates true airspeed, pressure altitude, density altitude, and Mach number. It accounts for compressibility effects and offers unit choices and keypad styles. Users can also input a correction factor for their airspeed indicator.

**Highlights:** True airspeed calculation, Pressure and density altitude calculation, Mach number calculation, Compressibility effects accounted for, Choice of input/result units, Calculator or telephone keypad options, Airspeed indicator correction factor

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Phenol55 free?

Phenol55 is free to download, with no in-app purchases.

### Is TruAirspeed free?

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

### Which has better reviews, Phenol55 or TruAirspeed?

Phenol55 is rated higher. Phenol55 averages 4.3 out of 5 from 6 ratings, while TruAirspeed averages 4.1 from 8 ratings.

### Do Phenol55 or TruAirspeed have ads?

Neither Phenol55 nor TruAirspeed shows ads.

### Which is updated more often, Phenol55 or TruAirspeed?

Phenol55 ships an update every 2 months, and TruAirspeed every 24 months. Most recently, Phenol55 was updated on September 16, 2026 and TruAirspeed on June 2, 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.*