# Compound Interest Calc + vs Invest with Knowledge!

The clearest difference is review sentiment: Invest with Knowledge! at 100% against Compound Interest Calc +'s 36%. Invest with Knowledge! also leads on price (Free vs $2.99) and rating (5.0 vs 4.8). Compound Interest Calc +'s advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Invest with Knowledge! is free to download; Compound Interest Calc + costs $2.99 up front. Invest with Knowledge! sells 1 in-app purchase, starting at $0.99 per month. Compound Interest Calc + asks for nothing beyond the download.

Invest with Knowledge! holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Compound Interest Calc + has 35 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 36% of Compound Interest Calc +'s written reviews are positive against 100% of Invest with Knowledge!'s.

Compound Interest Calc + ships an update fortnightly, Invest with Knowledge! monthly. The most recent releases landed on October 30, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Compound Interest Calc + | Invest with Knowledge! |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.8 (35 ratings)](https://appshunter.io/ios/app/compound-interest-calc-plus/id1360950679/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/invest-with-knowledge/id6761795259/reviews)** |
| Number of ratings | **35** | 3 |
| Positive reviews | 36.4% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 38 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Adam Fahlman](https://appshunter.io/developer/974051920) | [JOSIAH DAVID SWANSON](https://appshunter.io/developer/1891543376) |

## What reviewers say

### Compound Interest Calc +

[App page](https://appshunter.io/ios/app/compound-interest-calc-plus/id1360950679)

Calculate compound interest and future investment values with various parameters like principal, interest rate, and additional deposits. Export results to PDF or CSV and compare saved calculations.

**Highlights:** Compound interest calculation, Future value projection, Support for principal, interest, duration, inflation, and deposits, Flexible compounding and deposit frequencies, Detailed results including inflation-adjusted balance, PDF and CSV export, Save and compare calculations

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

**In-app purchases:** none


### Invest with Knowledge!

[App page](https://appshunter.io/ios/app/invest-with-knowledge/id6761795259)

This app helps users find undervalued stocks based on business fundamentals, inspired by Benjamin Graham's teachings. It provides weekly stock picks, an archive of past recommendations with performance data, and a practice portfolio feature.

**Highlights:** Find undervalued stocks, Weekly stock picks, Archive of past recommendations, Practice portfolio, Performance data tracking, Stock search by name/ticker

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| I.W.K. Pro | $0.99 | per month |


## Frequently asked questions

### Is Compound Interest Calc + free?

Compound Interest Calc + costs $2.99, with no in-app purchases.

### Is Invest with Knowledge! free?

Invest with Knowledge! is free to download, with in-app purchases available.

### Which has better reviews, Compound Interest Calc + or Invest with Knowledge!?

Invest with Knowledge! is rated higher. Compound Interest Calc + averages 4.8 out of 5 from 35 ratings, while Invest with Knowledge! averages 5.0 from 3 ratings.

### Do Compound Interest Calc + or Invest with Knowledge! have ads?

Invest with Knowledge! shows ads; Compound Interest Calc + does not.

### Which is updated more often, Compound Interest Calc + or Invest with Knowledge!?

Compound Interest Calc + ships an update fortnightly, and Invest with Knowledge! monthly. Most recently, Compound Interest Calc + was updated on October 30, 2026 and Invest with Knowledge! on October 6, 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.*