# Sensitivity Tests vs OptiFEST

Sensitivity Tests and OptiFEST are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sensitivity Tests ships an update every 5 weeks, OptiFEST monthly. The most recent releases landed on September 18, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Sensitivity Tests | OptiFEST |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Size | 105 MB | 93 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPad | iPad |
| Age rating | 4+ | 17+ |
| Developer | [Nikon Optical USA](https://appshunter.io/developer/566202027) | [NIKEL ARASTIRMA GELISTIRME YAZILIM DANISMANLIK OTOMASYON EGITIM ELEKTRONIK SAN TIC LTD STI](https://appshunter.io/developer/1223351254) |

## What reviewers say

### Sensitivity Tests

[App page](https://appshunter.io/ios/app/sensitivity-tests/id1338466692)

**Features:** macOS Compatibility

**In-app purchases:** none


### OptiFEST

[App page](https://appshunter.io/ios/app/optifest/id1502093862)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sensitivity Tests free?

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

### Is OptiFEST free?

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

### Do Sensitivity Tests or OptiFEST have ads?

Neither Sensitivity Tests nor OptiFEST shows ads.

### Which is updated more often, Sensitivity Tests or OptiFEST?

Sensitivity Tests ships an update every 5 weeks, and OptiFEST monthly. Most recently, Sensitivity Tests was updated on September 18, 2026 and OptiFEST on September 10, 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.*