# x2VOL_ vs Dolphin

The clearest difference is review sentiment: Dolphin at 84% against x2VOL_'s 15%. Dolphin also leads on rating (4.8 vs 4.2) and update cadence (every 2 weeks vs every 3 months). x2VOL_'s advantage is monetization model (free vs free with in-app purchases). 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.

Dolphin holds the better App Store score, 4.8 against 4.2. Both are backed by a comparable volume of ratings — 1.4K and 1.3K respectively. Written reviews point the same way: 15% of x2VOL_'s written reviews are positive against 84% of Dolphin's.

x2VOL_ ships an update every 3 months, Dolphin every 2 weeks. The most recent releases landed on October 21, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | x2VOL_ | Dolphin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (1.4K ratings)](https://appshunter.io/ios/app/x2vol/id897794733/reviews) | **[4.8 (1.3K ratings)](https://appshunter.io/ios/app/dolphin-sat-prep/id6748280981/reviews)** |
| Number of ratings | **1.4K** | 1.3K |
| Positive reviews | 15.1% of reviews | **83.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 21 MB | 229 MB |
| Requires iOS | 17.6 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [IntelliVOL](https://appshunter.io/developer/511523598) | [PaloAI Inc.](https://appshunter.io/developer/1824977301) |

## What reviewers say

### x2VOL_

[App page](https://appshunter.io/ios/app/x2vol/id897794733)

This app streamlines service hour tracking for K-12 students, allowing customization of goals and centralization of hours. It connects students with nonprofits, verifies service records, and generates official transcripts for college and scholarship applications.

**Highlights:** Customize service goals, Centralize service hours, Provide diverse service opportunities, Track and report service hours, Engage with nonprofits, Generate Official Service Transcript™

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

**In-app purchases:** none

**What reviewers like**

- 💯 Easiest way to track service hours
- 🚀 Great app, makes it much easier and more convenient to request verification for service hours

**What reviewers complain about**

- 🐛 Terrible user interface, app is broken and doesn't work on iPad
- 🐛 Completely broken, unable to log in
- 🐛 Slow, not synced to website, needs an update but no updates available
- 🐛 Trouble logging in, can't submit hours, keeps kicking user out of the app
- 🐛 Doesn't work, can't submit hours, forces user to use the website instead

**Reported bugs**

- Login issues, unable to log in even with correct credentials
- App says it needs an update but no updates are available
- Hours submitted disappear or don't sync properly
- App forces user to go to website instead of working in the app

**Requested features**

- Add drafts to save hours before submitting
- Allow users to change information about the company they did service with
- Increase the number of hours that can be submitted at once


### Dolphin

[App page](https://appshunter.io/ios/app/dolphin-sat-prep/id6748280981)

Master the Digital SAT with a unique, social media-inspired interface. Swipe through thousands of official practice questions with instant, short video explanations. The app intelligently adapts to your learning, focusing on your weak areas for efficient score improvement.

**Highlights:** 10,000+ Official Digital SAT Questions, Short Video Solutions for Every Problem, Personalized Learning Algorithm, Spaced Repetition for Retention, Frictionless Study Design, Score Tracking

**In-app purchases:** none


## Frequently asked questions

### Is x2VOL_ free?

x2VOL_ is free to download, with no in-app purchases.

### Is Dolphin free?

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

### Which has better reviews, x2VOL_ or Dolphin?

Dolphin is rated higher. x2VOL_ averages 4.2 out of 5 from 1.4K ratings, while Dolphin averages 4.8 from 1.3K ratings.

### Do x2VOL_ or Dolphin have ads?

Neither x2VOL_ nor Dolphin shows ads.

### Which is updated more often, x2VOL_ or Dolphin?

x2VOL_ ships an update every 3 months, and Dolphin every 2 weeks. Most recently, x2VOL_ was updated on October 21, 2026 and Dolphin on October 22, 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.*