# RKI OPLS vs Training Vault

The clearest difference is update cadence: RKI OPLS at every 2 months against Training Vault's every 10 months. On price, ads, in-app purchases and device support there is nothing between them.

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

RKI OPLS ships an update every 2 months, Training Vault every 10 months. The most recent releases landed on September 25, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | RKI OPLS | Training Vault |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rki-opls/id1502872792/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 10 months |
| Monetization | Free | — |
| Size | 55 MB | 6 MB |
| Requires iOS | 16.0 | **15.4** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [RKI Instruments, Inc.](https://appshunter.io/developer/1501378948) | [Trilix Marketing Group, Inc](https://appshunter.io/developer/859246799) |

## What reviewers say

### RKI OPLS

[App page](https://appshunter.io/ios/app/rki-opls/id1502872792)

Monitor readings and detector status for RKI's OPLS detector. Adjust operational parameters remotely. Essential for managing environmental monitoring equipment.

**Highlights:** View detector readings, Check detector status, Change operation parameters, Remote monitoring, Device management

**Features:** macOS Compatibility

**In-app purchases:** none


### Training Vault

[App page](https://appshunter.io/ios/app/training-vault/id1666637431)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RKI OPLS free?

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

### Is Training Vault free?

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

### Do RKI OPLS or Training Vault have ads?

Neither RKI OPLS nor Training Vault shows ads.

### Which is updated more often, RKI OPLS or Training Vault?

RKI OPLS ships an update every 2 months, and Training Vault every 10 months. Most recently, RKI OPLS was updated on September 25, 2026 and Training Vault on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*