# ROI Calculator vs TBK Machine

The clearest difference is in-app purchases: TBK Machine at none against ROI Calculator's 1. TBK Machine also leads on update cadence (weekly vs every 8 months) and iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. ROI Calculator sells 1 one-off in-app purchase. TBK Machine asks for nothing beyond the download.

ROI Calculator ships an update every 8 months, TBK Machine weekly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | ROI Calculator | TBK Machine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (156 ratings)](https://appshunter.io/ios/app/roi-calculator-calc/id1540243397/reviews)** | — |
| Number of ratings | **156** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 8 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 1 MB | 23 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) | [嘉 王](https://appshunter.io/developer/1858748757) |

## What reviewers say

### ROI Calculator

[App page](https://appshunter.io/ios/app/roi-calculator-calc/id1540243397)

Calculate Return on Investment (ROI) and Annualized ROI with ease. Input your investment amount, return, and period for precise financial insights. Contact the developer for any requests.

**Highlights:** Calculate ROI, Calculate Annualized ROI, Input investment amount, Input amount returned, Specify investment period, Accurate results

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all features | $2.99 | one-time |


### TBK Machine

[App page](https://appshunter.io/ios/app/tbk-machine/id6774526397)

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

**In-app purchases:** none


## Frequently asked questions

### Is ROI Calculator free?

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

### Is TBK Machine free?

TBK Machine is free to download, with no in-app purchases.

### Do ROI Calculator or TBK Machine have ads?

Neither ROI Calculator nor TBK Machine shows ads.

### Which is updated more often, ROI Calculator or TBK Machine?

ROI Calculator ships an update every 8 months, and TBK Machine weekly. Most recently, ROI Calculator was updated on November 3, 2026 and TBK Machine on November 5, 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.*