Bubble Level® vs iHP48
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Bubble Level®
This app provides a digital bubble level with multiple viewing options for precise measurements. It can be used for surface leveling, angle measurement, and checking flatness, offering versatile utility for various tasks.
- Surface level viewing
- Portrait and landscape orientation
- Angle and slope measurement in percentage
- Carpenter's level functionality
- Surface flatness check
- Line level
- Compass
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Check Bubble Level in the palm of your hand!!! We have 3 different viewing options: Surface level, Portrait Level and Landscape Level. Bubble calibrates smoothly with all 4 sides as well as show the angle and slope in percentage. There are different types of Bubble Level Tools: ◆ Carpenter's level ◆ Angle measurement ◆ Surface flatness ◆ Line Level ◆ Compass
iHP48
This app brings the powerful HP48 calculator experience to your mobile device. It offers enhanced performance, seamless file management, and a customizable interface with support for various HP calculator models. Enjoy a familiar and convenient calculator solution without needing extra hardware.
- Supports HP38, HP39, HP48, HP49, HP50 calculators
- Haptic feedback and customizable zoom options
- Seamless file transfer via iTunes and Files app
- Cloud storage integration (iCloud, OneDrive, Dropbox)
- Object saving/loading and copy/paste functionality
- Access to calculator packages, skins, and ROMs
- Internal file manager and extensible settings
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Introducing iHP48 - Your Ultimate Calculator Companion iHP48 emerges from the necessity to revive the unparalleled calculator experience cherished by university students and engineers across various disciplines. Reviving the legacy of the original calculator, iHP48 delivers enhanced performance without the burden of carrying an additional device in your bag. Experience the simplicity and convenience of having the powerful HP48 at your fingertips once again. Key Features: Wide Compatibility: iHP48 supports HP38, HP39, HP48, HP49, and HP50 calculators. Easily configure your preferred calculator with the Fetch options. Enhanced User Experience: Enjoy Haptic feedback on keypress and customizable haptic styles via Settings. Zoom options tailored to your iPhone and preferences, including a new lift zoom for XS devices. Seamless File Management: Transfer files effortlessly from your computer using iTunes on both PC's and MacOS. Access iHP48 files directly from your device using the Files app and share them with any compatible iOS app. Copy files to and from your favorite cloud providers supported by the Files app, such as iCloud Drive, OneDrive, and Dropbox. Convenient Object Handling: Save or Load objects to/from your device using Files, ensuring your favorite .lib is readily available on your iHP48 stack. Copy and Paste supported objects seamlessly between iOS and the iHP48 Stack. Comprehensive Library: Access a rich library of Calculator Packages, Skin Collections, ROM's, and useful libraries like Meta Kernel and QPI. Intuitive Interface: Benefit from an internal File Manager for simplified file management and an extensible Settings administration accessible directly from the Settings app or via a shortcut from the iHP48 menu. Customizable Experience: Save your current calculator configuration for easy access. Explore special features embedded in various skins, including screen swipes, sounds, and orientation options. No Hidden Costs: iHP48 is completely free, devoid of any enterprise, professional, plus, or ultimate versions. There are no hidden features or payments required. We greatly appreciate any support you offer as we continue to enhance and refine iHP48. For additional information, visit https://www.thinkchile.com/iHP48. Experience the power of the legendary HP48, reinvented for the modern era with iHP48.
Screenshots
Verdict
The clearest difference is review sentiment: iHP48 at 88% against Bubble Level®'s 33%. iHP48 also leads on in-app purchases (none vs 1) and ads (none vs shown). Bubble Level®'s advantage is iOS requirement (11.0 vs 15.0). On price 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® sells 1 one-off in-app purchase. iHP48 asks for nothing beyond the download.
iHP48 holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 84 and 270 respectively. Written reviews point the same way: 33% of Bubble Level®'s written reviews are positive against 88% of iHP48's.
Bubble Level® ships an update every 11 months, iHP48 monthly. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.
| Parameter | Bubble Level® | iHP48 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (84 ratings) | 4.7 (270 ratings) — better |
| Positive reviews | 33.3% of reviews | 88.3% of reviews — better |
| Number of ratings | 84 | 270 — better |
| Update frequency | Every 11 months | Monthly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 48 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Tripti Kumari | Alexis Lorca |
Customer experience
Bubble Level®
iHP48
Bugs and requests
Bubble Level®
Not enough reviews yet to summarise bugs or requests.
iHP48
Reported bugs
3 issues- Crashes on startup
- Inability to save state across sessions
- Incompatibility with certain iOS devices
Requested features
4 requests- Dark mode option
- Ability to disable haptic feedback
- Support for HP50G emulation
- Improved keyboard mapping and arrow key functionality
In-app purchases
Bubble Level®
- Remove Ads$3.99
iHP48
No in-app purchases









