# Percentage Calculators vs Stock Engine

The clearest difference is in-app purchases: Percentage Calculators at none against Stock Engine's 7. Stock Engine's advantage is update cadence (weekly vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Stock Engine sells 7 in-app purchases, starting at $1.99 per 7 days. Percentage Calculators asks for nothing beyond the download.

Percentage Calculators ships an update every 4 months, Stock Engine weekly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Percentage Calculators | Stock Engine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/percentage-calculators/id6450146247/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Free | — |
| Size | 33 MB | 78 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Jaydip Jethva](https://appshunter.io/developer/1625349421) | [SilentCreek Ltd](https://appshunter.io/developer/1834954051) |

## What reviewers say

### Percentage Calculators

[App page](https://appshunter.io/ios/app/percentage-calculators/id6450146247)

Calculate discounts, sales, tips, and various financial percentages with this comprehensive tool. It offers a wide array of calculators for everyday financial needs, from shopping to interest calculations.

**Highlights:** Discount and Sales Calculation, Tip Calculator, Interest Calculators (Simple & Compound), Fraction to Percentage Conversion, GST and VAT Calculation, CGPA and Marks to Percentage Conversion

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

**In-app purchases:** none


### Stock Engine

[App page](https://appshunter.io/ios/app/stock-engine/id6751415560)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly S - 1 Credit | $1.99 | per 7 days |
| Weekly M - 5 Credits | $5.99 | per 7 days |
| Weekly L - 10 Credits | $9.99 | per 7 days |
| Weekly XL - 20 Credits | $19.99 | per 7 days |
| 1 THESIS & MATCHED STOCKS | $0.99 | one-time |
| 40 thesis and matched stocks | $39.99 | one-time |
| 80 thesis and matched stocks | $79.99 | one-time |


## Frequently asked questions

### Is Percentage Calculators free?

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

### Is Stock Engine free?

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

### Do Percentage Calculators or Stock Engine have ads?

Neither Percentage Calculators nor Stock Engine shows ads.

### Which is updated more often, Percentage Calculators or Stock Engine?

Percentage Calculators ships an update every 4 months, and Stock Engine weekly. Most recently, Percentage Calculators was updated on October 24, 2026 and Stock Engine on October 25, 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.*