# Keystone Alg I Practice Tests vs PSAT 10 Test Prep Exam 2026

The clearest difference is price: PSAT 10 Test Prep Exam 2026 at Free against Keystone Alg I Practice Tests's $0.99. Keystone Alg I Practice Tests's advantage is in-app purchases (none vs 9) and iOS requirement (8.0 vs 15.1). On update cadence, ads and device support there is nothing between them.

PSAT 10 Test Prep Exam 2026 is free to download; Keystone Alg I Practice Tests costs $0.99 up front. PSAT 10 Test Prep Exam 2026 sells 9 in-app purchases, starting at $7.99 per 7 days. Keystone Alg I Practice Tests asks for nothing beyond the download.

Keystone Alg I Practice Tests ships an update every 2 months, PSAT 10 Test Prep Exam 2026 every 4 months. The most recent releases landed on November 1, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Keystone Alg I Practice Tests | PSAT 10 Test Prep Exam 2026 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[2.0 (7 ratings)](https://appshunter.io/ios/app/keystone-alg-i-practice-tests/id795334519/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Paid | — |
| Size | 27 MB | 53 MB |
| Requires iOS | **8.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [iPREPpress LLC](https://appshunter.io/developer/390888386) | [YAUHEN BAHDANOVICH](https://appshunter.io/developer/1711932790) |

## What reviewers say

### Keystone Alg I Practice Tests

[App page](https://appshunter.io/ios/app/keystone-alg-i-practice-tests/id795334519)

Prepare for your Algebra I exam with realistic practice tests. This app offers 120 multiple-choice questions across two tests, complete solutions, and helpful tools like a calculator and formula sheet to boost your confidence.

**Highlights:** 120 multiple-choice questions, Two practice tests with modules, Complete solutions provided, Formula sheet and calculator, Question navigator and flagging, Scoring with estimated Keystone score, Optional timer for time management

**Features:** macOS Compatibility

**In-app purchases:** none


### PSAT 10 Test Prep Exam 2026

[App page](https://appshunter.io/ios/app/psat-10-test-prep-exam-2026/id6748535896)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PSAT 10 Weekly Full Access | $7.99 | per 7 days |
| PSAT 10 Monthly Full Access | $17.99 | per month |
| PSAT 10 Monthly Full Access | $24.99 | per month |
| PSAT 10 Quarterly Full Access | $55.99 | per 3 months |
| PSAT 10 Quarterly Full Access | $59.99 | per 3 months |
| PSAT 10 Semiannual Full Access | $75.99 | per 6 months |
| PSAT 10 Semiannual Full Access | $79.99 | per 6 months |
| PSAT 10 Annual Full Access | $109.99 | per year |
| PSAT 10 Annual Full Access | $119.99 | per year |


## Frequently asked questions

### Is Keystone Alg I Practice Tests free?

Keystone Alg I Practice Tests costs $0.99, with no in-app purchases.

### Is PSAT 10 Test Prep Exam 2026 free?

PSAT 10 Test Prep Exam 2026 is free to download, with in-app purchases available.

### Do Keystone Alg I Practice Tests or PSAT 10 Test Prep Exam 2026 have ads?

Neither Keystone Alg I Practice Tests nor PSAT 10 Test Prep Exam 2026 shows ads.

### Which is updated more often, Keystone Alg I Practice Tests or PSAT 10 Test Prep Exam 2026?

Keystone Alg I Practice Tests ships an update every 2 months, and PSAT 10 Test Prep Exam 2026 every 4 months. Most recently, Keystone Alg I Practice Tests was updated on November 1, 2026 and PSAT 10 Test Prep Exam 2026 on October 28, 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.*