Steel Rain Call for Fire
Call-for-fire trainer
₹ 199 · Designed for iPad. Not verified for macOS.
v1.0.7 — Two new Fire Support Planning classes: EFSTs & Scheme of Fires (TPME), and Integrating Fires with Maneuver (SOSRA breach sequence + trigger lines).
Steel Rain is a Forward Observer training app for 13F (US Army) and 0861 (USMC) MOS soldiers, FOs, FSOs, JFOs, ROTC cadets, OCS candidates, FA OBC students, and anyone preparing for NCO/officer boards, the FIST certification, or company-level fire-support positions.
WHAT YOU GET
• BASIC TRAINING — Nine interactive classes covering Call-for-Fire format, mils & direction, map reading, OT-line corrections, the 15 subsequent corrections in doctrinal order, mil-relation range estimation, FO loadout, and fire support products. Each class follows a four-phase pattern: lessons → quiz → drills → complete. Per-attempt option shuffle. Earn XP and promote.
• FIRE MISSIONS — Live adjust-fire and grid-mission scenarios. Transmit calls for fire by voice using on-device speech recognition. Walk rounds in. FDC TTS voices respond in real time.
• ROC-V THREAT RECOGNITION — Identify 25 near-peer combat vehicles from silhouette: Russian armor (T-72, T-90, BMP-3, BTR-82), PLA platforms (Type-99, Type-96, ZBD-04, ZBL-08, HQ-9), Iranian variants (Karrar, Boragh, Fajr-5), and globally-fielded UAS (Shahed, Lancet, CH-4, Orlan-10). Practice mode for studying. Test mode for +50 XP per category passed.
• ADVANCED PILLAR — SGT-locked classes for senior FOs and promotion study: Immediate Suppression, Final Protective Fires (plan/register/call lifecycle), Danger Close + RED (the 600m working rule), and CAS 9-Line with Type 1/2/3 control and cleared-hot procedures.
• FIRE SUPPORT PLANNING PILLAR — SSG-locked, opens after all four Advanced classes. The senior planning curriculum: P1 D3A Targeting Cycle (Decide / Detect / Deliver / Assess and where the FO plugs in). P2 High-Payoff Targets & the AGM (HVT vs HPT, the HPTL, TSS, and reading the Attack Guidance Matrix). P3 EFSTs & the Scheme of Fires (the Essential Fire Support Task — TPME, task & purpose, method & effects, sequencing into a scheme of fires). P4 Integrating Fires with Maneuver (fires nested in the maneuver scheme — SOSRA breach fundamentals, trigger lines, phased fires, and a worked deliberate-breach example with the FO's exact lift/shift call).
• FIST CERT PREP — 298 ATP-grounded MQF questions for the Joint Fire Support Mandatory Qualification File. Every answer cross-checked against the source publications (ATP 3-09.30 Observed Fires, ATP 3-09.32 JFIRE, FM 3-09 Field Artillery Operations, JP 3-09 Joint Fire Support, JP 3-09.3 Close Air Support) with the verbatim doctrine reference in every explainer. Official MQF test composition: SL1 = 50 SL1 questions, SL2 = 50 SL1 + 25 SL2, SL3 = 50 SL1 + 25 SL2 + 25 SL3. Practice mode, mock test mode, missed-question spaced repetition, and flashcards.
DOCTRINE GROUNDING
All content cites US Army FM 3-09 / ATP 3-09.30 / ATP 3-09.32 (JFIRE) / TC 3-09.8 and USMC MCRP 3-31.6, plus JP 3-09 and JP 3-09.3 for joint fires. Standards-only — no unit SOP. Target numbers use the AB#### format soldiers actually transmit. Target groups use A#A. The 15 subsequent corrections are sequenced per ATP 3-09.30. The Fire Support Planning pillar grounds in FM 3-09 with verbatim chapter and paragraph citations in the lesson text.
BUILT BY AN SME
Steel Rain is built by a 13F with 20 years active-duty experience. Every lesson, quiz question, and drill scenario has been reviewed against doctrine. When the doctrine and the popular convention disagree, doctrine wins.
NOT A GAME
Steel Rain is a training aid. Ammunition, range, and dispersion values are unclassified doctrinal approximations. Not for operational targeting.
NO ADS. NO TRACKERS. NO ACCOUNTS REQUIRED.
Ratings & Reviews
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v1.0.7 — Two new Fire Support Planning classes.
The Planning pillar (unlocked at SSG with all four Advanced classes complete) now has four classes instead of two.
P3 — EFSTs & THE SCHEME OF FIRES. The Essential Fire Support Task — what makes a fires task "essential," how TPME (Task / Purpose / Method / Effect) structures it, and how EFSTs sequence into a scheme of fires the FO executes. 6 lessons, 6 quiz items, 4 recall cards, 2 applies-or-not drills, and a chip composer drill where you assemble a complete EFST in TPME order.
P4 — INTEGRATING FIRES WITH MANEUVER. Fires nested in the maneuver scheme. The four essential fires tasks (enable / isolate / screen / suppress). SOSRA — the deliberate breach sequence, all five letters: Suppress, Obscure, Secure, Reduce, Assault. The FO's critical lift/shift call during Assault. Trigger lines (phase / terrain / time / NAI). Phased fires across an operation (preparation / shaping / decisive / sustaining). Worked example: deliberate breach of a wire obstacle at a notional EE platoon position, walked through every SOSRA element with the FO's exact calls. 6 lessons, 7 quiz items, 4 recall cards, 2 applies drills, and a chip composer where you assemble SOSRA in doctrinal order.
Both classes are FM 3-09 grounded with verbatim chapter / paragraph citations in the lesson text. Order-strict matching enforces TPME on P3's chip drill and S-O-S-R-A on P4's chip drill — answer out of order and you're wrong, just like the doctrine.
Built by a 13F with 20 years AD. Standards-only — doctrine governs.
The developer, FISTWORLD AUTHENTIX INCORPORATED, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
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Information
- Provider
- FISTWORLD AUTHENTIX INCORPORATED
- Size
- 63.9 MB
- Category
- Education
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Infrequent
Guns or Other Weapons
- Copyright
- © 2026 FistWorld Authentix Incorporated

