Comparison

Horizontal Shaft Alignment vs Contacts Backups

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Horizontal Shaft Alignment

This app assists with horizontal shaft alignment for machinery like motors and pumps. It guides users through the measurement and alignment process using Bluetooth-connected sensors, offering features like Feetlock for challenging situations and instant PDF reporting.

Highlights
  • Bluetooth sensor connectivity
  • Guided measurement and alignment process
  • Feetlock function for base-bound machines
  • Instant PDF report generation
  • ACOEM Cloud integration for reporting and sharing
  • VertiZontal adjustment without re-measuring
Features
Read full description

This is a companion app for performing horizontal shaft alignment, using the RT 300/AT 200/AT 100, on typical applications such as a motor and a pump. The app guides the user throughout the complete measurement and alignment process when using the Bluetooth® connected ACOEM sensors. This offers an extensive shaft alignment package, including the Feetlock function that is useful in base/bolt-bound machine situations. The PDF Report function provides a fast on-site reporting capability by converting saved measurement reports into PDF files. Thanks to the ACOEM cloud instant reporting and instant sharing is easy. ---- Note: This app works only with the ACOEM RT-300 and AT-200 ---- Key Features: - Connected using Bluetooth® - GuideU: Our patented icon-based and color-coded adaptive user interface - VertiZontal™: adjust the machine both vertically and horizontally without re-measuring - Create an instant PDF-report - Connect to the ACOEM Cloud (optional) Visit the website www.acoem.com for more information on alignment in general, the ACOEM tools and support of the app.

About

Contacts Backups

Features
Read full description

Your contacts, protected and always under your control. Personal contacts are among the most valuable — and least protected — types of digital data. They are not just phone numbers or email addresses: they represent relationships, professional opportunities, personal connections, and years of important information stored in one place. Contacts Backup was created to provide a secure and reliable solution: control instead of dependence, transparency instead of opacity, and real protection without compromising privacy. MAIN FEATURES Controlled & Encrypted Backup • Voluntary and selective backups — only when you decide • End-to-end encryption for stored data • Restore your contacts anytime, with no lock-in Integrated Multi-Layer Security • Biometric authentication with Face ID and Touch ID • Protection against accidental deletion • Intelligent duplicate detection with full manual control Privacy & Full Control • You retain full ownership of your data • Fully functional offline when needed • No forced syncing, hidden processing, or data resale Native Experience on Apple Devices • Optimized for iPhone, iPad, and Mac • Clean and intuitive interface • Respectful integration with the Apple ecosystem WHO IT’S FOR • Professionals who rely on their contact network • Privacy-conscious users who value data ownership • Frequent travelers who change devices or SIM cards • Anyone who has lost contacts in the past and wants a reliable solution • Users who prefer transparent tools without ads or tracking PRODUCT PHILOSOPHY Contacts Backup is a protection tool — not a social network. It is designed to help you securely preserve and recover your contact data, while keeping you fully in control. We prioritize security, transparency, reliability, and privacy — with no compromises. Your contacts matter. Protect them with an app designed to truly respect them.

Screenshots

Horizontal Shaft Alignment4 screens
Contacts Backups4 screens

Verdict

The call

The clearest difference is in-app purchases: Horizontal Shaft Alignment at none against Contacts Backups's 1. Horizontal Shaft Alignment also leads on iOS requirement (13.0 vs 17.6). Contacts Backups's advantage is update cadence (every 9 days vs every 4 months). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Contacts Backups sells 1 one-off in-app purchase. Horizontal Shaft Alignment asks for nothing beyond the download.

UpkeepUpdate frequency

Horizontal Shaft Alignment ships an update every 4 months, Contacts Backups every 9 days. The most recent releases landed on October 17, 2026 and October 6, 2026 respectively.

Scorecard3 real differences · 6 level
Horizontal Shaft Alignment versus Contacts Backups: the parameters behind the verdict, then further details
ParameterHorizontal Shaft AlignmentContacts Backups
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 4 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.6
Further details — not scored
Size123 MB32 MB
Age rating4+4+
DeveloperACOEM GroupDywtal Digital

In-app purchases

None

Horizontal Shaft Alignment

No in-app purchases

1 purchases

Contacts Backups

One-time1
  • Premium Contacts Backup$6.99

Questions

Is Horizontal Shaft Alignment free?
Horizontal Shaft Alignment is free to download, with no in-app purchases.
Is Contacts Backups free?
Contacts Backups is free to download, with in-app purchases available.
Do Horizontal Shaft Alignment or Contacts Backups have ads?
Neither Horizontal Shaft Alignment nor Contacts Backups shows ads.
Which is updated more often, Horizontal Shaft Alignment or Contacts Backups?
Horizontal Shaft Alignment ships an update every 4 months, and Contacts Backups every 9 days. Most recently, Horizontal Shaft Alignment was updated on October 17, 2026 and Contacts Backups on October 6, 2026.

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