# Owll vs GTP API Gravity Calculator2

The clearest difference is price: Owll at Free against GTP API Gravity Calculator2's $9.99. Owll also leads on rating (4.8 vs 4.0) and ratings volume (3.1K vs 1). GTP API Gravity Calculator2's advantage is in-app purchases (none vs 10) and review sentiment (100% vs 66%). On ads there is nothing between them.

Owll is free to download; GTP API Gravity Calculator2 costs $9.99 up front. Owll sells 10 in-app purchases, starting at $5.99 per 7 days. GTP API Gravity Calculator2 asks for nothing beyond the download.

Owll holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Owll has 3.1K ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 66% of Owll's written reviews are positive against 100% of GTP API Gravity Calculator2's, so the app with the better star average is not the one people write more warmly about.

Owll ships an update fortnightly, GTP API Gravity Calculator2 every 2 months. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Owll | GTP API Gravity Calculator2 |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.8 (3.1K ratings)](https://appshunter.io/ios/app/owll-ai-note-taker-and-assistant/id6450300197/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/gtp-api-gravity-calculator2/id6742924006/reviews) |
| Number of ratings | **3.1K** | 1 |
| Positive reviews | 66.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | **#58** | #176 |
| Size | 124 MB | 9 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [VOCALBEATS.AI PTE. LTD.](https://appshunter.io/developer/1735466155) | [Gammon Technical Products](https://appshunter.io/developer/1163782116) |

## What reviewers say

### Owll

[App page](https://appshunter.io/ios/app/owll-ai-note-taker-and-assistant/id6450300197)

**Currently charting:** #58 Top Grossing · Utilities (US App Store)

This app automatically records, transcribes, and summarizes audio from meetings, lectures, and online videos. It offers AI-powered note-taking, organization, and sharing features, syncing seamlessly across multiple Apple devices and the web.

**Highlights:** AI-powered recording and transcription, Automatic meeting summaries and to-dos, Real-time transcription for online meetings, Seamless sync across Apple devices and web, Multilingual transcription and translation, AI study aid with flashcards and quizzes, Import audio from apps and YouTube videos

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Recorder Premium 1 Week | $5.99 | per 7 days |
| Recorder Pro+, 1 week | $7.99 | per 7 days |
| Call Recorder Plus, 1 week | $7.99 | per 7 days |
| Call Recorder Pro Access,1week | $7.99 | per 7 days |
| Call Recorder Pro, 1 week | $9.99 | per 7 days |
| Recorder Access 1 Year | $69.99 | per year |
| Recorder Plus Access 1 Year | $69.99 | per year |
| Recorder Plus, 1 year | $69.99 | per year |
| Recorder Plus Access, 1 year | $79.99 | per year |
| Call Recorder Pro, 1 year | $99.99 | per year |

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Accurate transcriptions
- 💡 Helpful for meetings and interviews
- 🎉 Reliable call recording

**What reviewers complain about**

- 🐛 Crashes and freezes
- 🚫 Subscription required
- 💰 Expensive pricing
- 🔇 Issues with call recording

**Reported bugs**

- Recordings interrupted by incoming calls
- Authentication code not received
- Inability to transfer transcriptions

**Requested features**

- Add real-time transcription
- Improve video recording support
- Allow easier sharing of transcripts


### GTP API Gravity Calculator2

[App page](https://appshunter.io/ios/app/gtp-api-gravity-calculator2/id6742924006)

**Currently charting:** #176 Top Paid · Utilities (US App Store)

This application calculates the corrected API gravity at 60°F for jet, gasoline, and diesel fuels. It also determines the total weight of the fuel. It's a digital replacement for physical slide calculators.

**Highlights:** Corrected API gravity calculation, Total fuel weight calculation, Supports jet, gasoline, and diesel fuels, Digital version of slide calculators, Developed in 2025

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

**In-app purchases:** none


## Frequently asked questions

### Is Owll free?

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

### Is GTP API Gravity Calculator2 free?

GTP API Gravity Calculator2 costs $9.99, with no in-app purchases.

### Which has better reviews, Owll or GTP API Gravity Calculator2?

Owll is rated higher. Owll averages 4.8 out of 5 from 3.1K ratings, while GTP API Gravity Calculator2 averages 4.0 from 1 ratings.

### Do Owll or GTP API Gravity Calculator2 have ads?

Neither Owll nor GTP API Gravity Calculator2 shows ads.

### Which is updated more often, Owll or GTP API Gravity Calculator2?

Owll ships an update fortnightly, and GTP API Gravity Calculator2 every 2 months. Most recently, Owll was updated on November 3, 2026 and GTP API Gravity Calculator2 on October 28, 2026.

### Which is more popular, Owll or GTP API Gravity Calculator2?

Owll currently peaks at #58 in the App Store charts, and GTP API Gravity Calculator2 at #176. Chart position reflects recent download velocity rather than total install base.

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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.*