Ruler App vs Tobi BLuE
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ruler App
Transform your iPhone or Apple Watch into a precise measuring tool. Easily switch between imperial and metric units and adjust the ruler's height for direct comparisons. Customize your experience with different color schemes.
- Imperial and metric scale switching
- Adjustable ruler height
- Color scheme customization
- Apple Watch compatibility
- Switchable ruler scales
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Turn your iPhone or Apple Watch into a ruler and measure the scale of any small thing. Features: - switch between imperial and metric scales - adjust the height of the ruler for direct comparison - different color schemes - switchable ruler scales Apple Watch App: - switch between imperial and metric scales - switchable ruler scales
Tobi BLuE
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Tobi BLuE connects to Charging Technologies Inc. Tobi battery monitoring devices and chargers equipped with 46-305 controls. It can be used to configure settings, monitor real time data and upload historical data.
Screenshots
Verdict
The clearest difference is price: Tobi BLuE at Free against Ruler App's $0.99. Tobi BLuE also leads on update cadence (every 2 months vs every 11 months). Ruler App's advantage is iOS requirement (12.0 vs 16.6). On 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
Tobi BLuE is free to download; Ruler App costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Ruler App ships an update every 11 months, Tobi BLuE every 2 months. The most recent releases landed on October 22, 2026 and October 25, 2026 respectively.
| Parameter | Ruler App | Tobi BLuE |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 2.6 (5 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 11 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPod, Apple Watch — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 2 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Piet Jonas | Ferro Magnetics Corporation |
In-app purchases
Ruler App
No in-app purchases
Tobi BLuE
No in-app purchases
Questions
Is Ruler App free?
Is Tobi BLuE free?
Do Ruler App or Tobi BLuE have ads?
Which is updated more often, Ruler App or Tobi BLuE?
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