# OnePrep vs SATellar

The clearest difference is rating: OnePrep at 4.7 against SATellar's 3.7. OnePrep also leads on ratings volume (722 vs 3) and update cadence (every 5 days vs fortnightly). SATellar's advantage is ads (none vs shown). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. OnePrep sells 24 in-app purchases, starting at $28.49 per 7 days and SATellar sells 9 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

OnePrep holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: OnePrep has 722 ratings behind it against 3, so its average is the more settled of the two.

OnePrep ships an update every 5 days, SATellar fortnightly. The most recent releases landed on October 30, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | OnePrep | SATellar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (722 ratings)](https://appshunter.io/ios/app/oneprep-sat-and-act-prep/id6755932961/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/satellar-digital-sat-prep/id6762492370/reviews) |
| Number of ratings | **722** | 3 |
| Positive reviews | 40.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Fortnightly |
| Monetization | Free with in-app purchases | Freemium |
| Size | 88 MB | 63 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MyDojo Inc.](https://appshunter.io/developer/1854476769) | [rajasekhar karawalla](https://appshunter.io/developer/1886608955) |

## What reviewers say

### OnePrep

[App page](https://appshunter.io/ios/app/oneprep-sat-and-act-prep/id6755932961)

Prepare for the SAT with a comprehensive study tool. Access thousands of practice questions, realistic mock exams, and AI-powered feedback. Get personalized guidance from an AI tutor to identify and improve weak areas for your dream score.

**Highlights:** Thousands of SAT-style practice questions, Realistic timed mock exams, Instant AI feedback and grading, Personalized study guidance, Progress tracking, Cross-device compatibility

**In-app purchases (24)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OnePrep Pro (1 Week) | $28.49 | per 7 days |
| OnePrep Plus (1 month) | $89.99 | per month |
| OnePrep Pro (1 Month) | $99.99 | per month |
| OnePrep Pro – Monthly | $99.99 | per month |
| OnePrep Plus (3 months) | $239.00 | per 3 months |
| OnePrep Pro (3 Months) | $269.00 | per 3 months |
| OnePrep Pro – 3 Months | $269.00 | per 3 months |
| OnePrep Plus (6 months) | $354.99 | per 6 months |
| OnePrep Pro (6 Months) | $414.99 | per 6 months |
| OnePrep Pro – 6 Months | $414.99 | per 6 months |
| OnePrep Plus (1 year) | $469.00 | per year |
| OnePrep Pro (1 Year) | $589.00 | per year |
| OnePrep Pro – Yearly | $589.00 | per year |
| OnePrep Plus Exam Pass (8-14 Days) | $80.00 | one-time |
| OnePrep Plus Exam Pass (15-28 Days) | $85.00 | one-time |
| OnePrep Pro Exam Pass (0-7 Days) | $89.00 | one-time |
| OnePrep Pro Exam Pass (8-14 Days) | $90.00 | one-time |
| OnePrep Pro Exam Pass (15-28 Days) | $95.00 | one-time |
| OnePrep Pro Exam Pass (29-30 Days) | $99.00 | one-time |
| OnePrep Pro Exam Pass (31-44 Days) | $134.99 | one-time |
| OnePrep Pro Exam Pass (45-58 Days) | $174.99 | one-time |
| OnePrep Pro Exam Pass (59-72 Days) | $209.99 | one-time |
| OnePrep Plus Exam Pass (8-10 Mos) | $429.00 | one-time |
| OnePrep Plus Exam Pass (10+ Months) | $464.99 | one-time |


### SATellar

[App page](https://appshunter.io/ios/app/satellar-digital-sat-prep/id6762492370)

Prepare for the Digital SAT with adaptive daily practice and simulated tests. Get a predicted score in minutes and focus on your weakest areas. Start for free with daily challenges and optional Pro upgrades for unlimited practice.

**Highlights:** Predicted SAT score in 5 minutes, Adaptive difficulty questions, Full-length SAT simulations, Thousands of real-style questions, Fix mistakes with explanations, Daily SAT challenge, Smart practice for weak topics

**Features:** Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SATellar — Digital SAT Prep | $4.99 | per month |
| SATellar Plus+ — 1500+ SAT | $7.99 | per month |
| SATellar Pro — 1400+ SAT Prep | $12.99 | per month |
| SATellar — Digital SAT Yearly | $35.99 | per year |
| SATellar Plus+ Yearly 1500+ | $59.99 | per year |
| SATellar Pro — Yearly 1400+ | $95.99 | per year |
| SAT Practice — 2 Sessions | $1.99 | one-time |
| SAT Practice — 10 Sessions | $7.99 | one-time |
| SAT Practice — 20 Sessions | $12.99 | one-time |


## Frequently asked questions

### Is OnePrep free?

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

### Is SATellar free?

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

### Which has better reviews, OnePrep or SATellar?

OnePrep is rated higher. OnePrep averages 4.7 out of 5 from 722 ratings, while SATellar averages 3.7 from 3 ratings.

### Do OnePrep or SATellar have ads?

OnePrep shows ads; SATellar does not.

### Which is updated more often, OnePrep or SATellar?

OnePrep ships an update every 5 days, and SATellar fortnightly. Most recently, OnePrep was updated on October 30, 2026 and SATellar on October 23, 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.*