# Sona Mobile vs Grades

The clearest difference is review sentiment: Grades at 70% against Sona Mobile's 20%. Grades also leads on rating (4.9 vs 2.7) and ratings volume (13K vs 10). Sona Mobile's advantage is in-app purchases (none vs 7) and iOS requirement (15.1 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Grades sells 7 in-app purchases, starting at $3.99 per month. Sona Mobile asks for nothing beyond the download.

Grades holds the better App Store score, 4.9 against 2.7. That said, the two scores are not equally well evidenced: Grades has 13K ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 20% of Sona Mobile's written reviews are positive against 70% of Grades's.

Sona Mobile ships an update every 3 months, Grades every 2 weeks. The most recent releases landed on July 25, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Sona Mobile | Grades |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (10 ratings)](https://appshunter.io/ios/app/sona-mobile/id562898091/reviews) | **[4.9 (13K ratings)](https://appshunter.io/ios/app/grades-grade-calculator-gpa/id1069653513/reviews)** |
| Number of ratings | 10 | **13K** |
| Positive reviews | 20.0% of reviews | **70.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 38 MB | 38 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sona Systems](https://appshunter.io/developer/562898094) | [Plutonium Apps, LLC](https://appshunter.io/developer/912615896) |

## What reviewers say

### Sona Mobile

[App page](https://appshunter.io/ios/app/sona-mobile/id562898091)

This mobile application grants users access to the Sona Systems platform. It is designed for participants, researchers, and principal investigators, requiring the specific URL of a Sona site for functionality.

**Highlights:** Access Sona Systems, For participants, For researchers, For principal investigators, Requires Sona site URL

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

**In-app purchases:** none


### Grades

[App page](https://appshunter.io/ios/app/grades-grade-calculator-gpa/id1069653513)

Calculate the exact scores needed on future assignments to achieve desired grades and overall GPA. Customize your experience with icons and colors, and manage assignments with flexible grading options.

**Highlights:** Grade Calculator, GPA Calculator, Custom icons and colors, Grouped assignments, Weighted or Points grading, Supports all GPA scales

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Grades Premium | $3.99 | per month |
| Grades Premium | $5.99 | per month |
| Grades Premium | $7.99 | per month |
| Grades Premium | $9.99 | per year |
| Grades Premium | $14.99 | per year |
| Grades Premium | $19.99 | per year |
| Grades Premium | $8.99 | one-time |

**What reviewers like**

- 👍 Easy to use and navigate
- 🚀 Helpful for tracking grades and calculating target grades
- 💡 Customizable grade settings
- 👍 Useful for staying on top of academic progress
- 👍 Aesthetically pleasing interface

**What reviewers complain about**

- 🔒 Limited to 3-4 classes in free version
- 💰 Premium version is required for more features
- 🐛 Occasional crashes and data loss issues
- 🔍 Lack of flexibility in grade scales and weighting

**Reported bugs**

- Courses and assignments disappearing after using the app
- Incorrect grade calculations when using grouped assignments
- Crashes after recent app updates

**Requested features**

- Add more than 4 classes in free version
- Ability to customize grade scales (e.g. GCSE, WAM)
- Option to add bonus points or extra credit
- GPA calculator that accounts for credit hours
- Calendar integration for assignment tracking


## Frequently asked questions

### Is Sona Mobile free?

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

### Is Grades free?

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

### Which has better reviews, Sona Mobile or Grades?

Grades is rated higher. Sona Mobile averages 2.7 out of 5 from 10 ratings, while Grades averages 4.9 from 13K ratings.

### Do Sona Mobile or Grades have ads?

Neither Sona Mobile nor Grades shows ads.

### Which is updated more often, Sona Mobile or Grades?

Sona Mobile ships an update every 3 months, and Grades every 2 weeks. Most recently, Sona Mobile was updated on July 25, 2026 and Grades on September 26, 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.*