SIG BDX vs TNTCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SIG BDX
This application connects a rangefinder to a riflescope, displaying an illuminated holdover dot for precise aiming. It facilitates syncing devices and provides ballistic data for accurate shots up to 800 yards.
- Sync rangefinder with riflescope
- Display illuminated holdover dot
- Measure target distance
- Ballistic data integration
- Connect The Dot™ system
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The KILO BDX rangefinders use Applied Ballistics and Bluetooth® to illuminate the exact holdover dot in SIERRA3BDX riflescopes. For the most accurate and ethical shot, just Connect The Dot™. - DOWNLOAD: Download the app - SYNC: Sync the app with your rangefinder - BOND: Use the app to bond the rangefinder with the riflescope - RANGE: Press the RANGE button to measure the distance of your target - POWER SELECTOR RING: When the SIERRA3BDX riflescope is actively paired with a KILO BDX rangefinder, the blue LED on the power selector ring will be illuminated solid blue. This Blue LED will flash quickly 8X for one second whenever the riflescope has received a new holdover reticle update from the rangefinder. The BDX system works out to 800 yards with 1 MOA of accuracy - CONNECT THE DOT™: It’s time for hunting. Once the riflescope is turned on, range the target and the new hold is lit up out to 800 yards
TNTCalc
This app calculates the difficulty of routines for trampoline and tumbling athletes. It allows users to quickly enter skills and see the corresponding difficulty, aiding in routine planning and review for competitions.
- Routine difficulty calculation
- Supports Trampoline, Double Mini, and Tumbling
- Purpose-built skill keypad
- Experiment with skill combinations
- Designed for competition
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TNTCalc — Trampoline & Tumbling Difficulty Calculator TNTCalc is a simple, fast difficulty calculator built specifically for the Trampoline & Tumbling community. Whether you're an athlete, coach, parent, or fan, TNTCalc makes it easy to enter skills and calculate routine difficulty without manually working through every value. Calculate difficulty for: - Trampoline (TR) - Double Mini Trampoline (DMT) - Tumbling (TUM) Designed for competition Quickly enter skills using a purpose-built keypad, see the corresponding difficulty, and experiment with different combinations while planning or reviewing routines. TNTCalc started as a small project created to help young T&T athletes calculate and understand their routines. It has since grown into a free resource used by the broader trampoline and tumbling community. Simple. Fast. Built for T&T. TNTCalc is an independent tool and is not affiliated with or endorsed by USA Gymnastics (USAG), the Fédération Internationale de Gymnastique (FIG), or other governing organizations.
Screenshots
Verdict
The clearest difference is rating: TNTCalc at 5.0 against SIG BDX's 3.4. SIG BDX's advantage is ratings volume (68 vs 1). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.
TNTCalc holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: SIG BDX has 68 ratings behind it against 1, so its average is the more settled of the two.
| Parameter | SIG BDX | TNTCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (68 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 68 — better | 1 |
| Update frequency | Every 3 weeks | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 137 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Sig Sauer, Inc. | Ramy Basily |
Customer experience
SIG BDX
TNTCalc
In-app purchases
SIG BDX
No in-app purchases
TNTCalc
No in-app purchases









