# ReimersIndexApp vs ISNCSCI Algorithm

The clearest difference is price: ISNCSCI Algorithm at Free against ReimersIndexApp's $4.99. ISNCSCI Algorithm also leads on update cadence (every 3 months vs every 9 months) and iOS requirement (13.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

ISNCSCI Algorithm is free to download; ReimersIndexApp costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReimersIndexApp ships an update every 9 months, ISNCSCI Algorithm every 3 months. The most recent releases landed on October 7, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | ReimersIndexApp | ISNCSCI Algorithm |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 months** |
| Size | 1 MB | 10 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [ORTHOPRACTIS.COM SINGLE MEMBER P.C.](https://appshunter.io/developer/1286360877) | [Praxis Spinal Cord Institute](https://appshunter.io/developer/980028790) |

## What reviewers say

### ReimersIndexApp

[App page](https://appshunter.io/ios/app/reimersindexapp/id1299545292)

**Features:** Vision Pro support

**In-app purchases:** none


### ISNCSCI Algorithm

[App page](https://appshunter.io/ios/app/isncsci-algorithm/id6476418908)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ReimersIndexApp free?

ReimersIndexApp costs $4.99, with no in-app purchases.

### Is ISNCSCI Algorithm free?

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

### Do ReimersIndexApp or ISNCSCI Algorithm have ads?

Neither ReimersIndexApp nor ISNCSCI Algorithm shows ads.

### Which is updated more often, ReimersIndexApp or ISNCSCI Algorithm?

ReimersIndexApp ships an update every 9 months, and ISNCSCI Algorithm every 3 months. Most recently, ReimersIndexApp was updated on October 7, 2026 and ISNCSCI Algorithm on September 22, 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.*