Rebars+ vs NanoBattery
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rebars+
Calculate the area of steel rebars for beams, slabs, and shear reinforcement. Supports standard US, Canadian, and European rebar sizes in both metric and non-metric units.
- Beam Reinforcement calculator
- Slab Reinforcement calculator
- Shear Reinforcement calculator
- US, Canadian, and European rebar sizes
- Metric and non-metric units
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Easy calculator for area of steel rebars Quickly find the area of steel rebars - based on "total number" or "spacing" - for "beams", "slabs" and "shear reinforcement". It's very useful for civil engineers / structural engineers. Includes standard US, CA, and European rebar sizes (metric and non-metric units). FEATURES • Beam Reinforcement calculator (area for a given number of rebars) • Slab Reinforcement calculator (area for rebars based on their spacing) • Shear Reinforcement calculator (area of stirrup legs for the specified spacing) REBAR SIZES / UNITS • US (#) rebar sizes with non-metric units (inch, foot) • Canadian (M) rebar sizes with metric units (mm, m) • European (Φ) standard rebar sizes with metric units (cm, m)
NanoBattery
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NanoBattery is the essential utility for your Apple Watch. Stop guessing how much power is left on your wrist. NanoBattery seamlessly syncs your Apple Watch battery level to your iPhone, keeping you informed at a glance. Designed with a sleek "Black & Yellow" aesthetic perfect for OLED screens, NanoBattery feels right at home on your modern iOS device. KEY FEATURES: • Instant Monitoring: Check your Watch battery level directly from the app dashboard. • Smart Widgets: Add beautiful widgets to your Home Screen and Lock Screen to track power levels without unlocking your phone. • Dynamic Island & Live Activities: Keep an eye on your battery in real-time with support for the latest iOS features. • Custom Alerts: Receive a notification on your iPhone when your Watch battery drops below a specific threshold (e.g., 20%). • Battery-Friendly: Uses efficient background refresh technology to sync data without draining your device. HOW IT WORKS: NanoBattery uses background app refresh to periodically fetch data from your Watch (typically every 15-20 minutes) or instantly when you open the app or tap the widget. PRIVACY FIRST: No data collection, no tracking. Your battery data stays between your devices. Download NanoBattery today and never let your Watch run out of power unexpectedly!
Screenshots
Verdict
The clearest difference is price: NanoBattery at Free against Rebars+'s $0.99. Rebars+'s advantage is iOS requirement (9.0 vs 17.6). 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
NanoBattery is free to download; Rebars+ costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Rebars+ | NanoBattery |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 11 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 9.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 14 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Kamran Saberihaghighi | Giovanni Outerleys |
In-app purchases
Rebars+
No in-app purchases
NanoBattery
No in-app purchases









