x2VOL_ vs Dolphin
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
x2VOL_
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.
- Customize service goals
- Centralize service hours
- Provide diverse service opportunities
- Track and report service hours
- Engage with nonprofits
- Generate Official Service Transcript™
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x2VOL is the leading student service hour tracking app in K-12 education. With x2VOL you can customize service goals, centralize service hours, and provide diverse service opportunities. x2VOL provides students with an online and mobile way to track and report service hours specific to the goals of their school while engaging them with nonprofits. Service records are authenticated and verified for each student and can be attached to their college applications, scholarship applications, or resumes through x2VOL’s Official Service Transcript™. x2VOL is a 3-time Winner of the District Administration Top 100 Products; was a "Finalist" in the "Cool Tool Award" from the EdTech Digest Awards Program; recognized by eSchoolMedia as an Honorable Mention in the 2014-15 Readers’ Choice Awards; was a finalist in the 2015 REVERE Awards; and two years in a row, won Best Social-Emotional Development Solution in the SIIA CODiE Awards in 2017 and 2018.
Dolphin
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.
- 10,000+ Official Digital SAT Questions
- Short Video Solutions for Every Problem
- Personalized Learning Algorithm
- Spaced Repetition for Retention
- Frictionless Study Design
- Score Tracking
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Build a steady SAT and ACT study habit with Dolphin. Practice in a swipeable feed, work through explanations, and return to the questions and skills that need more attention. PRACTICE A LITTLE EVERY DAY Answer Math, Reading, English, and Science questions, review vocabulary, and set a daily learning goal. UNDERSTAND YOUR ANSWERS Use worked explanations, video solutions where available, and Pip the Tutor to explore a problem. Save questions and revisit mistakes as you study. MAKE ROOM TO FOCUS With your permission, Focus Mode uses Apple's Screen Time controls to block apps you choose on your selected schedule. Complete your lesson goal to unlock them, or take a break when you need one. KEEP YOUR MOMENTUM Track your streak and progress, and add Dolphin widgets to keep your learning goal close by. Dolphin offers optional in-app subscriptions. Features and content availability may vary. SAT is a trademark of the College Board, and ACT is a trademark of ACT, Inc. Dolphin is not affiliated with or endorsed by either organization.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | x2VOL_ | Dolphin |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (1.4K ratings) | 4.8 (1.3K ratings) — better |
| Positive reviews | 15.1% of reviews | 83.7% of reviews — better |
| Number of ratings | 1.4K — better | 1.3K |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 16.0 — better |
| Further details — not scored | ||
| Size | 21 MB | 229 MB |
| Age rating | 4+ | 4+ |
| Developer | IntelliVOL | PaloAI Inc. |
Customer experience
x2VOL_
Dolphin
Bugs and requests
x2VOL_
Reported bugs
4 issues- 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
3 requests- 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
Not enough reviews yet to summarise bugs or requests.
In-app purchases
x2VOL_
No in-app purchases
Dolphin
No in-app purchases







