Bench
Live workbench for sight tapes. Filter All / Compound / Recurve. Gold FAB starts a new tape. Pull-to-refresh sits on the list.
Peep height, sight radius, and a chrono estimate become sequential yardage marks on a carbon-studio tape. Four rooms: Bench, Arsenal, Lab, Studio.
Live workbench for sight tapes. Filter All / Compound / Recurve. Gold FAB starts a new tape. Pull-to-refresh sits on the list.
Bow and arrow profiles. Tabs: Bows, Arrows, Add. Gold FAB opens a new bow. Arrow cards show live FOC percent.
Matching lab: FOC balancer, spine match guide, kinetic energy. Header copy: calculated offline.
Yards or meters, grains or grams, theme System / Light / Dark, distance-set composer, search across the kit.
The list subtitle: peep, radius, and speed become a printable pin stack — shoot the end, not guess the mark. Each card shows tape name, linked bow, mark count, zero distance, and chrono fps. Empty state: build a tape from a bow profile and a practice distance set.
First launch seeds three tapes, all zeroed at 20 yd with grid snap on:
The editor toolbar: Undo / Redo mark moves, delete selected mark, bring mark to front, toggle grid snap, share printable tape. Header line: bow name · arrow name · chrono fps.
Add yardage chips pull leftover distances from the linked set. Relayout rebuilds marks from ballistics (chrono speed, sight radius, zero). Selected pin: scale 0.6–1.8×, rotate −30° to 30°. Zero slider 10–40 yd.
Share writes a 420×1400 PNG: navy gradient, gold pin lines, distance labels. Chooser title: “Share sight tape”. On Android 10+ the file lands in Pictures/SightMark as SightMark_<name>_<time>.png. WRITE_EXTERNAL_STORAGE is requested only up to API 28. The app has no INTERNET permission.
SightTapeCalculator uses g = 32.174 ft/s². Speed is coerced to at least 80 fps. Time of flight for a yardage is (yd × 3) / speed. Drop in inches is 0.5 × g × t² × 12. Gap versus zero is the difference of those drops. Sight gap in inches is sightRadiusIn × tan(atan(drop / (rangeFt × 12))), with range in feet at least 1. Layout then normalizes gaps onto the tape between offsetY 0.08 and 0.92 (minimum span 0.25 in). Default unused-distance palette if a set is missing: 20, 30, 40, 50, 60 yd.
Arsenal subtitle: compound and recurve geometry plus shaft builds you can swap onto any tape. A bow stores ATA, brace, peep height, sight radius, IBO (optional), chrono fps, draw weight, draw length, and notes. Kind is Compound or Recurve. An arrow stores family (Aluminum / Carbon), spine, GPI, length, point / insert / nock / fletch grains, and vane count. Shaft grains = GPI × length. Total grains = shaft + point + insert + nock + fletch. Arrow detail opens FOC bench, edit, or delete.
| Bow | Kind | Draw | Chrono / IBO | Peep · radius | Notes in the profile |
|---|---|---|---|---|---|
| 4-H Youth Recurve 24# | Recurve | 24# @ 25" | 175 / — | 4.2" · 28" | Club starter recurve. Soft peep, long radius, backyard 20–40. ATA 62", brace 7.5". |
| Indoor 18 m Compound | Compound | 50# @ 28" | 268 / 310 | 3.8" · 30" | Hold-heavy indoor rig. Single-spot 18 m, tight 20 yd zero. ATA 32", brace 7.0". |
| Outdoor 3D Compound | Compound | 62# @ 29" | 292 / 340 | 4.0" · 31" | Walk-up 3D. Fast cams, 20–60 ladder, gold pin stack. ATA 33", brace 6.75". |
| Club Hunter 60# | Compound | 60# @ 28.5" | 280 / 330 | 3.6" · 29" | Coach loaner hunter. Confirm ethical KE before any field use. ATA 31", brace 6.5". |
| Barebow Recurve 32# | Recurve | 32# @ 27" | 165 / — | 5.0" · 26" | String-walking notes live on the tape, not a sight bar. ATA 66", brace 8.25". |
| Arrow | Family · spine | GPI · length | Point / insert / nock / fletch | Vanes |
|---|---|---|---|---|
| Easton 1816 Youth | Aluminum 1816 | 11.3 · 28" | 75 / 12 / 12 / 15 gr | 3 |
| Victory VAP 400 Indoor | Carbon 400 | 7.8 · 29" | 100 / 16 / 10 / 21 gr | 3 |
| Gold Tip Hunter 340 | Carbon 340 | 8.9 · 28.5" | 125 / 18 / 11 / 24 gr | 4 |
| Black Eagle Rampage 300 | Carbon 300 | 9.5 · 29" | 125 / 20 / 10 / 18 gr | 3 |
| Easton XX75 2016 | Aluminum 2016 | 10.5 · 30" | 100 / 14 / 12 / 16 gr | 3 |
| Carbon Express Maxima 350 | Carbon 350 | 8.3 · 28" | 100 / 15 / 9 / 20 gr | 3 |
Studio copy: ladders that feed the tape generator. This is not a scorebook / not a score log. You can add rungs (converted to yards if metric), tap a chip to remove it, name the block, and write a purpose line. Gold FAB: New distance set. Four seeded blocks:
| Set | Rungs | Blurb in the app |
|---|---|---|
| Youth 20–50 ladder | 20, 25, 30, 40, 50 yd | 4-H backyard block. Feeds the youth tape, not a scorecard. |
| Indoor 18 m block | 18 m + 20 yd | 18 m + 20 yd confirmation pins for club nights. |
| Outdoor 3D 20–60 | 20, 25, 30, 35, 40, 50, 60 yd | Walk-up 3D stack. Drop these onto the live tape. |
| Field FITA rungs | 30, 40, 50, 60 yd | Field-style rungs for outdoor club practice. |
Lab kicker “Daily insights”, title “Matching lab”, subtitle “FOC windows, spine families, and ethical energy bands — calculated offline.” Three tools plus a short list of the first three seeded bows (chrono, radius, “20 yd zero typical”).
Stations used: point 0.35", insert 0.9", shaft at mid-length, fletch at length − 3.2", nock at length − 0.35". FOC % from balance vs geometric center. Sliders on the FOC screen: point 50–150 gr, insert 0–40 gr, length 24–32".
<9% Light — “Nose-light — add point weight or shorten the shaft.” 9–16% Ideal — “Stable FOC window for backyard and 3D setups.” >16% Heavy — “Very forward — great for hunting, watch trajectory.”
Filters chart rows where draw is within ±2 lb of the row’s range, then sorts by point-mass hint. Score 0–100 from draw and point deltas. Sliders: draw 18–75 lb, draw length 22–32", point 70–140 gr. Owned spines in your kit are tagged “in kit”.
ke = massGr × fps² / 450240. Momentum = massGr × fps / 225218 (shown as slug·fps). Speed slider 140–340 fps. Energy screen subtitle: “Speed × arrow mass. Bands are educational — not a license to hunt.” Scale line in the UI: “25 target · 40 3D · 55 deer-class”.
KE cues in code: <25 “Target / small game band — keep distances close.” <40 “Youth / 3D practice energy. Fine for foam, not big game.” <55 “Whitetail-class education band at modest range.” else “High-energy hunting band — still confirm your ethical yardage.”
| Family | Spine | Draw lb | Point hint | Note on the chart |
|---|---|---|---|---|
| Aluminum | 1816 | 20–30 | 75 gr | Youth recurve / barebow |
| Aluminum | 1916 | 28–36 | 80 gr | Club recurve indoor |
| Aluminum | 2016 | 32–42 | 100 gr | Adult aluminum indoor |
| Aluminum | 2216 | 40–50 | 100 gr | Heavy outdoor aluminum |
| Carbon | 600 | 24–34 | 80 gr | Light youth carbon |
| Carbon | 500 | 32–42 | 90 gr | Indoor 18 m compound |
| Carbon | 400 | 40–50 | 100 gr | All-around backyard |
| Carbon | 350 | 48–56 | 110 gr | Outdoor 3D compound |
| Carbon | 340 | 52–60 | 125 gr | Hunting / 3D stiff |
| Carbon | 300 | 58–70 | 125 gr | High poundage carbon |
Studio title “Standards”. Distance chips: Yards / Meters. Mass chips: Grains / Grams. They switch independently. Theme chips: System, Light, Dark. Defaults are imperial (yards and grains). Studio footer: “SightMark Bow Kit stores everything on-device. No account, no range diary.”
Search kit filters bows, arrows, tapes, and blocks in one pass (chips All / Bows / Arrows / Tapes / Blocks). Bow match uses name + kind; arrow uses name + spine; tapes and blocks use name.
First-run onboarding (three pages, gold dots, Skip / Next / Get Started):
Bows, arrows, tapes, marks, and distance sets live in a local Room database (sightmark.db). Units, theme, and onboarding-done live in DataStore (sightmark_prefs).
If a tape will not share, a seeded kit looks empty, or a Lab number does not match what you expected from the formulas above, write the developer. Say which room you were in (Bench, Arsenal, Lab, Studio), the bow / arrow / tape name, and what you tapped. Typical support notes include Android version and a short description of the last action — that is enough to start.
Developer: Sokol_Maksym
Support email: lashandashecklerzd0132@gmail.com
There is no in-app chat and no account login. Mail is the support channel. Energy bands in Lab are educational copy from the app — they are not a hunting license and not a substitute for local rules or a coach.
It uses time of flight from yardage and chrono speed (minimum 80 fps), drop with g = 32.174 ft/s², then converts the drop-versus-zero into a sight gap with your sight radius. Marks are then spread on the tape between 8% and 92% of the stage height. Relayout rebuilds that stack from the current bow and distance set.
Light is under 9% (“Nose-light — add point weight or shorten the shaft.”). Ideal is 9–16% (“Stable FOC window for backyard and 3D setups.”). Heavy is above 16% (“Very forward — great for hunting, watch trajectory.”). The percent comes from point, insert, shaft, fletch, and nock stations on the shaft — not from a scale photo.
No. The Energy screen says the bands are educational — not a license to hunt. Cues mention target / small game, youth / 3D foam, a whitetail-class education band, and a high-energy hunting band that still asks you to confirm ethical yardage. Club Hunter’s own note: confirm ethical KE before any field use.
In the tape editor, use Share printable tape. The app draws a 420×1400 PNG (navy gradient, gold pins, labels) and opens the system share sheet. On Android 10 and newer it also stores the image under Pictures/SightMark. There is no PDF export in the app.
Yes. Studio splits distance (Yards / Meters) and mass (Grains / Grams). They are stored separately. Copy in Studio: every open project recalculates instantly when those chips change.
Five bows, six arrows, four distance sets, and three tapes listed on this page. Onboarding page three says youth recurve, indoor 18 m, and outdoor 3D kits ship seeded so the bench is live on first launch.
Studio states everything is stored on-device — no account, no range diary. Lab says calculations run offline. The Android manifest does not declare INTERNET. The only extra storage permission is WRITE_EXTERNAL_STORAGE, limited to Android 9 and below, for saving a shared tape image.