Bullet Flight L1 vs Calccis
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Bullet Flight L1
This ballistic computer provides quick, accurate shooting solutions up to 3000 meters. It offers detailed calculations, custom weapon profiles, and real-time wind drift adjustments for precise aiming.
- Ballistic computation up to 3000 meters
- Customizable weapon profiles
- Real-time wind drift calculation
- Scope click adjustments
- Metric and imperial unit support
- Built-in bullet database
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This is for BulletFlight L1. There are also Level-2 and M (BulletFlight Military) versions of this app. Level-2 adds a full calculation screen where you may enter exact range and atmospheric details, the ability to generate a range-card, cosine-angle calculation, GPS functionality to get your location and download local weather information, a mil-dot range estimation feature, and the ability to use non-standard weather conditions in the calculation. Further, Level-2 and above shows impact energy, velocity, and flight time - but only on the full-calculation screen or range-card. BulletFlight Level-M (Military) version further adds the ability to calculate an actual BC based on bullet drop, two velocities, or flight time. The ability to calculate bullet stability. Bullet spin drift is added to the computation, and the Coriolis effect (Earth’s rotation) may be factored in. Knight's Armament Bullet Flt L1 is a ballistic computer that provides quick solutions in the field. BulletFlight does not output information in table format but rather dynamically gives you the solution you need now to make that shot. The app provides detailed solutions out to 3000 meters. Your weapon profile includes your scope MOA/mRad per click, and hence when you provide a range to the target, the app will simply show how many clicks you need to change the scope by for that range and wind speed. Up to five ballistic coefficients with corresponding velocity thresholds may be used for each profile to enhance accuracy, or use a single G1, G7, or G8 value. Several built-in profiles for the Army's M110 semi-automatic precision rifle, the 14.5 inch SR16 rifle, The 50 BMG M107, .308 M40A3, .308 M24, and the 6.5mm KAC PDW allow you to get started quickly. You may alter these profiles, or add new ones. This app has been in combat use by military snipers in Iraq and Afghanistan. Features: Built-in profiles for common military rifles, but easily add more custom profiles. Accurate bullet database with most major brands. 2000 meters range Fast and accurate ballistic computation using G1, G7, or G8 ballistic coefficients. Easy to use interface yet powerful and full featured. All relevant data on screen all at once. User interface designed to minimize chance of input errors. "Simple Screen" with distance wheel. Output in inches, cm, MOA, Mils, and scope clicks. Option for Meteric units. In most cases imperial and metric are visible at the same time. Direct input for scopes with either MOA or mRad metric input (such as Schmidt & Bender). Calculates 360 degree wind drift using either degree or O'Clock format input. Wind speed may be specified in either miles-per-hour or meters-per-second. Sight-in weather may be logged and stored for automatic normalization to standard conditions. So you may sight in at any temperature or altitude and later be accurate at any other temperature or altitude. Built-in help screen. --------------------------- Also see my other apps: Bullet Flight M Bullet Flight L2
Calccis
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Calccis is a reverse polish notation (RPN) calculator. It supports basic arithmetic, trigonometrical, logarithm and exponent calculations for real, fractional, and complex numbers. Degrees and radians can be used for trigonometrical functions. You can perform matrix calculations, too. There is an undo stack, which supports undoing and redoing the 100 latest operations. Calccis does not copy or mimic any existing physical calculators. However, the operation of the stack has been influenced by how the stack works in the 1990s Hewlett-Packard HP-48 family of calculators.
Screenshots
Verdict
The clearest difference is price: Calccis at Free against Bullet Flight L1's $3.99. Calccis also leads on rating (5.0 vs 2.3) and update cadence (every 3 weeks vs every 4 months). Bullet Flight L1's advantage is ratings volume (3 vs 1) and iOS requirement (8.0 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
Calccis is free to download; Bullet Flight L1 costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Calccis holds the better App Store score, 5.0 against 2.3. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
Bullet Flight L1 ships an update every 4 months, Calccis every 3 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | Bullet Flight L1 | Calccis |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 2.3 (3 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 4 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 8.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 2 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Runaway Technology, Inc. | Jukka Aittola |
In-app purchases
Bullet Flight L1
No in-app purchases
Calccis
No in-app purchases









