SSC Spring Engineering vs Blacklist Datalog Viewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SSC Spring Engineering
This utility app assists with spring engineering calculations, including conversions, new designs, and comparisons. It helps determine spring and drum specifications for various applications, such as rolling steel doors, and calculates lifting capacities.
- Spring conversion
- New spring engineering
- Drum specification comparison
- IPPT spring calculation
- Rolling steel door spring design
- Approximate pull calculation
- Maximum lift capacity determination
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Convert springs, engineer new springs, compare drum specifications, calculate springs by IPPT, design springs for rolling steel doors, calculate approximate pull, or determine the maximum lift a spring/drum can lift on any job at any time. Application developed by Service Spring Corporation - a leader in spring manufacturing and customer service in the overhead door industry.
Blacklist Datalog Viewer
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Blacklist Datalog Viewer is a simple EFI log review tool for checking Holley EFI datalogs on iPhone. Import a log from Files or AirDrop, view live channel readouts, zoom through the timeline, and export the original log file when needed. Built for quick reviews at the track, in the shop, or while helping customers remotely. This app is not affiliated with or endorsed by Holley Performance Products.
Screenshots
Verdict
The clearest difference is price: SSC Spring Engineering at Free against Blacklist Datalog Viewer's $3.99. SSC Spring Engineering also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). Blacklist Datalog Viewer's advantage is update cadence (every 2 weeks vs every 6 months). On 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
SSC Spring Engineering is free to download; Blacklist Datalog Viewer costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
SSC Spring Engineering ships an update every 6 months, Blacklist Datalog Viewer every 2 weeks. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.
| Parameter | SSC Spring Engineering | Blacklist Datalog Viewer |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 4.6 (28 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 28 — better | — |
| Update frequency | Every 6 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 38 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Service Spring Corporation | Dimitri Antona |
In-app purchases
SSC Spring Engineering
No in-app purchases
Blacklist Datalog Viewer
No in-app purchases
Questions
Is SSC Spring Engineering free?
Is Blacklist Datalog Viewer free?
Do SSC Spring Engineering or Blacklist Datalog Viewer have ads?
Which is updated more often, SSC Spring Engineering or Blacklist Datalog Viewer?
Other comparisons
