# Payment Calculator vs Prisma

The clearest difference is in-app purchases: Prisma at none against Payment Calculator's 1. Prisma also leads on update cadence (every 2 weeks vs every 13 months). On price, ads, device support and iOS requirement there is nothing between them.

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

Payment Calculator ships an update every 13 months, Prisma every 2 weeks. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Payment Calculator | Prisma |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (23 ratings)](https://appshunter.io/ios/app/payment-calculator-repayment/id1589639737/reviews)** | — |
| Number of ratings | **23** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 1 MB | 24 MB |
| Requires iOS | 16 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) | [BCH SB LLC](https://appshunter.io/developer/1684204842) |

## What reviewers say

### Payment Calculator

[App page](https://appshunter.io/ios/app/payment-calculator-repayment/id1589639737)

Easily calculate monthly loan payments based on loan term or desired monthly amount. Generates a detailed payment schedule for clarity. Designed for intuitive and straightforward use.

**Highlights:** Monthly payment calculation, Loan term input, Monthly payment input, Payment schedule generation, Intuitive interface

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

**In-app purchases (1)**

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


### Prisma

[App page](https://appshunter.io/ios/app/prisma/id6504189090)

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

**In-app purchases:** none


## Frequently asked questions

### Is Payment Calculator free?

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

### Is Prisma free?

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

### Do Payment Calculator or Prisma have ads?

Neither Payment Calculator nor Prisma shows ads.

### Which is updated more often, Payment Calculator or Prisma?

Payment Calculator ships an update every 13 months, and Prisma every 2 weeks. Most recently, Payment Calculator was updated on October 24, 2026 and Prisma on October 13, 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.*