Percent Error Calculator vs TPI Bridge
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Percent Error Calculator
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Percent error calculator finds the relative error between the observed and true values.
TPI Bridge
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The App will receive the Routes from the C-Trend II software via Cloud and transfer them via Bluetooth to the 9080 vibration data collector. Once The vibration data is collected the App will retrieve it from the 9080 device and send it back to the C-Trend II software via Cloud.
Screenshots
Verdict
The clearest difference is iOS requirement: TPI Bridge at 11.0 against Percent Error Calculator's 13.0. 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.
Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 3, 2026 and October 11, 2026 respectively.
| Parameter | Percent Error Calculator | TPI Bridge |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 40 MB | 66 MB |
| Age rating | 4+ | 4+ |
| Developer | Stage Coding | C-Cubed |
In-app purchases
Percent Error Calculator
No in-app purchases
TPI Bridge
No in-app purchases
Questions
Is Percent Error Calculator free?
Is TPI Bridge free?
Do Percent Error Calculator or TPI Bridge have ads?
Which is updated more often, Percent Error Calculator or TPI Bridge?
Other comparisons
