Sapphire App vs PQDIF Viewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sapphire App
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Connect to measure devices to obtain measurements and to configure settings
PQDIF Viewer
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PQDIF Viewer is a simple to use tool to chart Power Quality data in PQD files (IEEE 1159.3-2025). Open files from Mail, Files, or AirDrop, or tap the bundled sample to try it out. Built for power system engineers who need to inspect data on the go.
Screenshots
Verdict
The clearest difference is update cadence: PQDIF Viewer at every 3 days against Sapphire App's every 4 months. On price, ads, in-app purchases and device support 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.
Sapphire App ships an update every 4 months, PQDIF Viewer every 3 days. The most recent releases landed on September 17, 2026 and September 21, 2026 respectively.
| Parameter | Sapphire App | PQDIF Viewer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 127 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Elspec | Russell Patterson |
In-app purchases
Sapphire App
No in-app purchases
PQDIF Viewer
No in-app purchases
Questions
Is Sapphire App free?
Is PQDIF Viewer free?
Do Sapphire App or PQDIF Viewer have ads?
Which is updated more often, Sapphire App or PQDIF Viewer?
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