SPRINGviewer vs DrillOut Calcs
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SPRINGviewer
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SPRINGviewer enables users to visualize and share model results with both geologists and non-geologists. The app provides an intuitive way to explore datasets generated by the SPRING groundwater model, including finite element meshes, geological structures, and various plots.
DrillOut Calcs
This app offers essential calculations for oilfield professionals performing post-frac plug drill-outs. It provides quick and accurate tools to verify flow balance, annular velocity, sweep efficiency, and surface return timing in real time, designed for simplicity and speed.
- Post-frac plug drill-out calculations
- Flow balance verification
- Annular velocity calculation
- Sweep efficiency assessment
- Surface return timing
- Real-time data verification
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Drill-Out Calculator provides quick, accurate tools for oilfield professionals performing post-frac plug drill-outs. Built for simplicity and speed, it helps verify flow balance, annular velocity, sweep efficiency, and surface return timing in real time.
Screenshots
Verdict
The clearest difference is update cadence: SPRINGviewer at weekly against DrillOut Calcs's every 3 weeks. DrillOut Calcs's advantage is iOS requirement (18.5 vs 26.0). 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.
SPRINGviewer ships an update weekly, DrillOut Calcs every 3 weeks. The most recent releases landed on September 12, 2026 and July 31, 2026 respectively.
| Parameter | SPRINGviewer | DrillOut Calcs |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Weekly — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 26.0 | 18.5 — better |
| Further details — not scored | ||
| Size | 73 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Torsten Seidel | Cody Martin |
In-app purchases
SPRINGviewer
No in-app purchases
DrillOut Calcs
No in-app purchases
