RKI OPLS vs OnSite Supervisor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RKI OPLS
Monitor readings and detector status for RKI's OPLS detector. Adjust operational parameters remotely. Essential for managing environmental monitoring equipment.
- View detector readings
- Check detector status
- Change operation parameters
- Remote monitoring
- Device management
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For RKI’s OPLS detector. View readings and detector status. Change operation parameters
OnSite Supervisor
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The Supervisor mobile app is designed exclusively for project supervisors. It offers the following features: - A timeclock that uses QR scanning for clocking IN and OUT. - Buyout releases, enabling material buyouts to be arranged from the dashboard, which allows supervisors to release orders, aiding in the tracking of budgeted quantities. - Tool Tracking, which is integrated into a tool inventory system and uses QR codes to track tool.
Screenshots
Verdict
The clearest difference is iOS requirement: OnSite Supervisor at 13.2 against RKI OPLS's 16.0. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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, OnSite Supervisor monthly. The most recent releases landed on September 25, 2026 and October 10, 2026 respectively.
| Parameter | RKI OPLS | OnSite Supervisor |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 13.2 — better |
| Further details — not scored | ||
| Size | 55 MB | 15 MB |
| Age rating | 4+ | 17+ |
| Developer | RKI Instruments, Inc. | James Blasdell |
In-app purchases
RKI OPLS
No in-app purchases
OnSite Supervisor
No in-app purchases
Questions
Is RKI OPLS free?
Is OnSite Supervisor free?
Do RKI OPLS or OnSite Supervisor have ads?
Which is updated more often, RKI OPLS or OnSite Supervisor?
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