Rieter Calculator vs Bubble Level AI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rieter Calculator
This utility app converts textile units like yarn count between different systems. It also includes basic calculator functions for everyday use.
- Textile unit conversion
- Yarn count conversion (Ne to Nm)
- Basic calculator functions
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The Rieter Calculator allows to convert textile units e.g. yarn count from Ne to Nm. Beside the conversion of textile units it also offers the basic functions of a simple calculator.
Bubble Level AI
This app transforms your device into a high-precision measurement tool for levels, surfaces, and angles. It offers real-time sensor data, voice guidance for hands-free operation, and camera integration for easy setup. Advanced features and unlimited history are available via an in-app purchase.
- Multi-mode measurements (Level, Surface, Angle)
- Live motion sensor data
- Voice guidance for hands-free use
- Camera integration for measurement grids
- Orientation lock and calibration
- Data export (text, CSV)
- Offline functionality
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TrueLevel turns your iPhone into a pocket‑size, high‑precision measurement suite built for engineers, architects, outdoor enthusiasts, and anyone who needs accurate level data on the go. Core Features • Multi‑Mode Measurements – Instantly capture Level, Surface, Angle, and Three‑in‑One readings. • Live Motion Sensors – Real‑time sensor fusion delivers sub‑millimeter stability, even when you’re on the move. • Voice Guidance – Hands‑free operation with clear, customizable voice prompts; perfect for hazardous or hard‑to‑reach environments. • Premium Pro View – Unlock advanced analytics, unlimited history, and export options with a single in‑app purchase. • Camera Integration – Snap a photo of your setup; the app automatically aligns your measurement grid. • Orientation Lock & Calibration – Pin orientation, set a custom zero point, and store calibrated presets for repeatable measurements. • Dark / Light Mode – Seamless UI that adapts to your environment for optimal readability. • Sharing Made Easy – Export results as text, CSV, or share a ready‑to‑send summary directly from the app. Why TrueLevel? - Professional‑grade accuracy without expensive hardware. - Intuitive UI built in SwiftUI for smooth, buttery interactions. - Fully offline – No internet needed once installed. - Privacy‑first – All data stays on‑device unless you choose to share. Perfect For • Surveyors & construction crews • Architects & interior designers • Outdoor adventurers & climbers • DIY hobbyists • Students learning physics or engineering Technical Highlights • SwiftUI + Combine – Modern, reactive UI that feels alive. • Core Motion – High‑frequency sensor polling for crisp data. • StoreKit 2 – Seamless, Apple‑approved in‑app purchases. • Accessibility – VoiceOver, Dynamic Type, and high‑contrast support. Ready to level up? Download TrueLevel today and turn every surface into a precise datum. EULA / Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: Bubble Level AI at 5.0 against Rieter Calculator's 2.5. Bubble Level AI also leads on update cadence (every 2 months vs every 26 months) and review sentiment (100% vs 83%). Rieter Calculator's advantage is in-app purchases (none vs 2) and iOS requirement (9.1 vs 18.0). On price, ratings volume, 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
Both are free to download. Bubble Level AI sells 2 in-app purchases, starting at $0.99 per month. Rieter Calculator asks for nothing beyond the download.
Bubble Level AI holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews point the same way: 83% of Rieter Calculator's written reviews are positive against 100% of Bubble Level AI's.
Rieter Calculator ships an update every 26 months, Bubble Level AI every 2 months. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.
| Parameter | Rieter Calculator | Bubble Level AI |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (2 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 83.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 | 4 — better |
| Update frequency | Every 26 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 9.1 — better | 18.0 |
| Further details — not scored | ||
| Size | 5 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Rieter Machine Works Ltd. | Kirby Salter |
Customer experience
Rieter Calculator
Bubble Level AI
In-app purchases
Rieter Calculator
No in-app purchases
Bubble Level AI
- Monthly Premium7 Days trial$0.991 Month
- Lifetime Premium Access$4.99
Questions
Is Rieter Calculator free?
Is Bubble Level AI free?
Which has better reviews, Rieter Calculator or Bubble Level AI?
Do Rieter Calculator or Bubble Level AI have ads?
Which is updated more often, Rieter Calculator or Bubble Level AI?
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