Transferidor BLA vs Slope Level RX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Transferidor BLA
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Measures any angle. The iPhone becomes a protractor. You rest it against a surface, a wall, a ramp, and read the large angle in BLA typography. Tap to calibrate, hold mode to freeze the reading. The free protractors on the App Store are throwaway utilities, full of ads, with garish icons. Transferidor BLA is the opposite. Editorial typography, Areia BLA background, large angle display in whole degrees, arc with fine marks every 5 degrees and long marks every 15. WHAT IT'S FOR When the problem is the tilt: the accessibility ramp at the store (code says at most 8.33%), the TV that needs to hang straight on the wall, the small solar panel that wants about 16 degrees in Goiânia, the picture frame to be cut at 45, the wobbly table leg. The protractor from your school ruler now fits in your pocket. And it shows you with calm. ARC AND POINTER Semicircle arc with fine marks every 5 degrees, long marks every 15, numbers 15, 30, 45, 60, 75 and 90 on both sides of zero at the top. Pointer animated with soft physics, no jitter on quick moves. Large angle display in whole degrees, in serif Tinta. NOTABLE ANGLES When the angle hits a value that matters to the craft (zero, one third, half, two thirds, plumb), the app highlights quietly with a Verde BLA capsule. No fanfare. Just an editorial confirmation. CALIBRATION The reading comes from the accelerometer and gyroscope of the iPhone, with magnetic correction so it doesn't drift when you rotate the device. You place the iPhone on what you consider zero (the surface that should be level, the wall that should be plumb), tap calibrate, and the app reads the tilt relative to that zero. Works the same in portrait, in landscape, in any rest. Tap recalibrate to change the reference, tap clear calibration in Settings to go back to the raw reading. HOLD MODE Tap hold to freeze the reading on the display. Useful for measuring in tight spots (under a piece of furniture, behind a TV, in an awkward angle) and reading it later. Tap release to resume. 2 THEMES Areia BLA, light background with the brand base. Tinta, dark mode for low-light environments. The theme follows the iPhone's Dark Mode. 100% OFFLINE No data collection. No network. No login. No analytics. No crash reports. One-time purchase, open, measure. Transferidor BLA is an app made in Goiânia by BLA Publicações e Conteúdo Digital, an independent editorial studio led by Ivan Grycuk.
Slope Level RX
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Slope Level turns your iPhone into a clear and practical slope meter for everyday measuring tasks. Use it to check surfaces, shelves, frames, tripods, vehicle parking angles, camping ground, and other non-certified measurement needs. The main screen opens directly to live readings, so you can measure without menus or setup. Key features: • Real-time slope and tilt measurement • Plane mode for flat surfaces • Edge mode for one-axis angle checks • Zero calibration for relative measurement • Hold current reading • Save local measurement history • Switch between degrees, percent grade, and slope ratio • Light and dark appearance with configurable theme colors • Works offline and does not require an account Slope Level is designed for quick reference and everyday utility. It is not a certified industrial measuring instrument and should not be used for safety-critical or regulated engineering measurements. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: Transferidor BLA at Free against Slope Level RX's $1.99. Transferidor BLA also leads on in-app purchases (none vs 1). On update cadence, ads, device support and iOS requirement 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
Transferidor BLA is free to download; Slope Level RX costs $1.99 up front. Slope Level RX sells 1 one-off in-app purchase. Transferidor BLA asks for nothing beyond the download.
Transferidor BLA ships an update every 2 weeks, Slope Level RX every 3 weeks. The most recent releases landed on September 16, 2026 and September 9, 2026 respectively.
| Parameter | Transferidor BLA | Slope Level RX |
|---|---|---|
| Price | Free — better | $1.99 |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone | iPhone |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | BLA Publicações e Conteúdo Digital | 浩东 许 |
In-app purchases
Transferidor BLA
No in-app purchases
Slope Level RX
- Lifetime Membership$2.99
Questions
Is Transferidor BLA free?
Is Slope Level RX free?
Do Transferidor BLA or Slope Level RX have ads?
Which is updated more often, Transferidor BLA or Slope Level RX?
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