# Compound Interest Calc + vs Roth Grains

The clearest difference is price: Roth Grains at Free against Compound Interest Calc +'s $2.99. Compound Interest Calc +'s advantage is update cadence (fortnightly vs every 6 months) and iOS requirement (13.0 vs 15.1). On ads, in-app purchases and device support there is nothing between them.

Roth Grains is free to download; Compound Interest Calc + costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Compound Interest Calc + ships an update fortnightly, Roth Grains every 6 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Compound Interest Calc + | Roth Grains |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.8 (35 ratings)](https://appshunter.io/ios/app/compound-interest-calc-plus/id1360950679/reviews)** | — |
| Number of ratings | **35** | — |
| Positive reviews | 36.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 6 months |
| Monetization | Paid | — |
| Size | 1 MB | 36 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) | [Barchart](https://appshunter.io/developer/730277257) |

## 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


### Roth Grains

[App page](https://appshunter.io/ios/app/roth-grains/id1571323412)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Compound Interest Calc + free?

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

### Is Roth Grains free?

Roth Grains is free to download, with no in-app purchases.

### Do Compound Interest Calc + or Roth Grains have ads?

Neither Compound Interest Calc + nor Roth Grains shows ads.

### Which is updated more often, Compound Interest Calc + or Roth Grains?

Compound Interest Calc + ships an update fortnightly, and Roth Grains every 6 months. Most recently, Compound Interest Calc + was updated on October 29, 2026 and Roth Grains on October 27, 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.*