Calipers Tape Measure vs SHDW Operator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calipers Tape Measure
Measure objects of any size with your phone. Features a 5-meter tape measure for larger items and a precision caliper mode for measuring small objects down to a tenth of a millimeter. Offers highly accurate readings tested across various devices and settings.
- 5-meter tape measure
- Precision caliper mode
- Measure to 0.1mm accuracy
- Spirit level functionality
- Accurate measurement testing
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Calipers lets you take measurements when you're on the go. For the big things, there's 5 meter tape measure. Simply place your iPhone on a surface so the ‘zero’ aligns with where you want to start your measurement. Next, place a finger near the bottom of your iPhone and slide your iPhone along the surface, keeping your finger still. Finally, when your finger reaches the top, repeat the process again until you’ve completed your measurement For the little things, the calipers mode will let you measure objects within a tenth of a millimeter. Simply place an object on the screen, and drag the top and bottom guides until they are just visible. To get really accurate readings, you can use the ‘plus’ and ‘minus’ buttons to move the guides closer or further apart by a 1/10th of a millimeter. 6 out of the top 10 free apps in this category are off by as much as 10% on the iPhone 12 & 13 Mini, or when some accessibility features are enabled. Since most people don't check their app against a ruler - we felt it was really important we did! This app has been throughly tested to ensure the measurements are accurate in every scenario.
SHDW Operator
Monitor the status and performance of your Shadow Nodes. Receive timely notifications about any changes to your nodes, including their rank, rewards, and uptime. Access helpful links to leaderboards and your Grafana site.
- Check Node status
- View Node rank and rewards
- Monitor Node uptime
- Track Node wield version and specs
- Check wallet shdwPoints
- Access Leaderboard links
- Link to Grafana site
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This is a convenient way to check on your Shadow Nodes status as a Shadow Operator, and you can receive periodic notifications on any changes. You can check on the following in the app: - Node is up and running/verified - Node rank - Node rewards - Node uptime and earning time - Node wield version - Node specs - Wallet shdwPoints The app also can help with giving you handy links like the following: - The Shadow Node Leaderboard - Link to your Grafana site
Screenshots
Verdict
The clearest difference is price: SHDW Operator at Free against Calipers Tape Measure's $1.99. SHDW Operator also leads on rating (5.0 vs 4.3) and update cadence (every 2 days vs every 3 months). Calipers Tape Measure's advantage is ratings volume (26 vs 1). On ads, in-app purchases, monetization model 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
SHDW Operator is free to download; Calipers Tape Measure costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
SHDW Operator holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Calipers Tape Measure has 26 ratings behind it against 1, so its average is the more settled of the two.
Calipers Tape Measure ships an update every 3 months, SHDW Operator every 2 days. The most recent releases landed on October 15, 2026 and October 11, 2026 respectively.
| Parameter | Calipers Tape Measure | SHDW Operator |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.3 (26 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 77.8% of reviews | — |
| Number of ratings | 26 — better | 1 |
| Update frequency | Every 3 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Jacob Parker | Michael Wildermuth |
Customer experience
Calipers Tape Measure
SHDW Operator
In-app purchases
Calipers Tape Measure
No in-app purchases
SHDW Operator
No in-app purchases
Questions
Is Calipers Tape Measure free?
Is SHDW Operator free?
Which has better reviews, Calipers Tape Measure or SHDW Operator?
Do Calipers Tape Measure or SHDW Operator have ads?
Which is updated more often, Calipers Tape Measure or SHDW Operator?
Other comparisons
