diff --git a/AGENTS.md b/AGENTS.md
index 397e854..87ce61f 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -15,7 +15,8 @@ This repository is a **static GitHub Pages site**. There is no .NET / MAUI app,
 ## Conventions
 
 - Vanilla HTML/CSS/JS. Classic `<script>` tags (not ES modules) so `file://` and Pages both work.
-- Time format: `h:mm` (minutes always two digits).
+- Time format: results use `h:mm` (minutes always two digits). Worked time is two numeric fields (hours, minutes 0–59) so mobile keyboards do not need `:`.
+- Default start date: 1 January of the current calendar year (`app.js`). Default end date: today.
 - Working days: Monday–Friday minus ISO dates in `HOLIDAYS` (`worktime.js`). Compare `YYYY-MM-DD` strings; iterate in UTC.
 - Expected hours: **8 per working day** (`HOURS_PER_DAY`).
 - UI language: Spanish. README and this file: English.
@@ -49,7 +50,7 @@ Edit `HOURS_PER_DAY` in `worktime.js`.
 ## Pitfalls
 
 - Zero working days: do not divide; show `—` for the daily average.
-- Invalid `h:mm` and start-after-end must show an error, not silent zeros.
+- Invalid hours/minutes (minutes over 59) and start-after-end must show an error, not silent zeros.
 - Relative asset paths only (`styles.css`, not `/styles.css`) so the project Pages URL works.
 - Do not reintroduce a MAUI/XAML app unless explicitly requested.
 
diff --git a/README.md b/README.md
index 817e167..3bce0b0 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,8 @@ python3 -m http.server 8080
 
 Then visit `http://localhost:8080`.
 
+The start date defaults to **1 January of the current year**; the end date defaults to today.
+
 ## GitHub Pages
 
 1. Merge this to `main`.
@@ -34,7 +36,7 @@ Alternative: **Deploy from a branch** → `main` → `/` (root). Asset paths are
 - Expected hours = `8 × working days` (the main result).
 - Difference = hours worked − expected (minus sign and red when behind).
 - Daily average = worked ÷ working days (`—` if there are no working days).
-- Time format: `h:mm` with two-digit minutes.
+- Time format: results use `h:mm` with two-digit minutes. Input is two numeric fields (hours and minutes), so Android can use the number keypad.
 
 Holidays (2025, carried over from the former MAUI app):
 
diff --git a/app.js b/app.js
index 9c54945..cb86587 100644
--- a/app.js
+++ b/app.js
@@ -4,7 +4,8 @@
   var form = document.getElementById("calc-form");
   var startInput = document.getElementById("start-date");
   var endInput = document.getElementById("end-date");
-  var hoursInput = document.getElementById("worked-hours");
+  var hoursInput = document.getElementById("worked-h");
+  var minutesInput = document.getElementById("worked-m");
   var errorEl = document.getElementById("form-error");
   var daysEl = document.getElementById("working-days");
   var expectedEl = document.getElementById("expected-hours");
@@ -19,10 +20,15 @@
     return y + "-" + m + "-" + d;
   }
 
+  function yearStartIso() {
+    return new Date().getFullYear() + "-01-01";
+  }
+
   function setDefaults() {
-    if (!startInput.value) startInput.value = "2024-12-30";
+    if (!startInput.value) startInput.value = yearStartIso();
     if (!endInput.value) endInput.value = todayIso();
-    if (!hoursInput.value) hoursInput.value = "0:00";
+    if (!hoursInput.value) hoursInput.value = "0";
+    if (!minutesInput.value) minutesInput.value = "0";
   }
 
   function showError(message) {
@@ -31,7 +37,12 @@
   }
 
   function render() {
-    var result = Worktime.calculate(startInput.value, endInput.value, hoursInput.value);
+    var parts = Worktime.parseDurationParts(hoursInput.value, minutesInput.value);
+    var result = Worktime.calculate(
+      startInput.value,
+      endInput.value,
+      parts ? parts.hmm : "invalid"
+    );
 
     if (!result.ok && result.error === "range") {
       showError("La fecha inicial no puede ser posterior a la final.");
@@ -43,9 +54,9 @@
       return;
     }
 
-    if (!result.ok && result.error === "hours") {
-      showError("Usa el formato h:mm, por ejemplo 160:30.");
-      daysEl.textContent = String(result.days);
+    if (!parts || (!result.ok && result.error === "hours")) {
+      showError("Usa horas enteras y minutos de 0 a 59.");
+      daysEl.textContent = result.days != null ? String(result.days) : "—";
       expectedEl.textContent = Worktime.formatHmm(result.expected);
       differenceEl.textContent = "—";
       differenceEl.classList.remove("is-behind");
@@ -72,4 +83,7 @@
   startInput.addEventListener("change", render);
   endInput.addEventListener("change", render);
   hoursInput.addEventListener("input", render);
+  hoursInput.addEventListener("change", render);
+  minutesInput.addEventListener("input", render);
+  minutesInput.addEventListener("change", render);
 })();
diff --git a/index.html b/index.html
index 6e8dd86..a11b21d 100644
--- a/index.html
+++ b/index.html
@@ -30,15 +30,34 @@ <h1>Horas laborales</h1>
           <input id="end-date" name="end" type="date" required />
         </div>
         <div class="field">
-          <label for="worked-hours">Horas trabajadas (h:mm)</label>
-          <input
-            id="worked-hours"
-            name="worked"
-            type="text"
-            inputmode="numeric"
-            placeholder="160:30"
-            autocomplete="off"
-          />
+          <span class="group-label" id="worked-label">Horas trabajadas</span>
+          <div class="duration" role="group" aria-labelledby="worked-label">
+            <div class="field nested">
+              <label for="worked-h">Horas</label>
+              <input
+                id="worked-h"
+                name="workedHours"
+                type="number"
+                inputmode="numeric"
+                min="0"
+                step="1"
+                autocomplete="off"
+              />
+            </div>
+            <div class="field nested">
+              <label for="worked-m">Minutos</label>
+              <input
+                id="worked-m"
+                name="workedMinutes"
+                type="number"
+                inputmode="numeric"
+                min="0"
+                max="59"
+                step="1"
+                autocomplete="off"
+              />
+            </div>
+          </div>
         </div>
         <button type="submit">Calcular</button>
         <p id="form-error" class="error" hidden></p>
diff --git a/styles.css b/styles.css
index 572c0e0..b35fabd 100644
--- a/styles.css
+++ b/styles.css
@@ -61,14 +61,27 @@ form,
   margin-bottom: 1rem;
 }
 
-label {
+label,
+.group-label {
   font-size: 0.92rem;
   font-weight: 600;
 }
 
+.duration {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 0.75rem;
+}
+
+.field.nested {
+  margin-bottom: 0;
+}
+
 input[type="date"],
-input[type="text"] {
+input[type="text"],
+input[type="number"] {
   font: inherit;
+  width: 100%;
   padding: 0.5rem 0.65rem;
   border: 1px solid var(--line);
   border-radius: 8px;
diff --git a/worktime.js b/worktime.js
index d36aaac..c0d5e2b 100644
--- a/worktime.js
+++ b/worktime.js
@@ -61,7 +61,25 @@
     return days * perDay;
   }
 
-  /** Parse "h:mm" into decimal hours. Empty string → 0. Invalid → null. */
+  /** Hours + minutes fields (Android numeric keypad). Empty → 0. Minutes must be 0–59. */
+  function parseDurationParts(hoursRaw, minutesRaw) {
+    function asInt(raw) {
+      var s = String(raw == null ? "" : raw).trim();
+      if (s === "") return 0;
+      if (!/^\d+$/.test(s)) return null;
+      return Number(s);
+    }
+    var hours = asInt(hoursRaw);
+    var minutes = asInt(minutesRaw);
+    if (hours == null || minutes == null || minutes > 59) return null;
+    return {
+      hours: hours,
+      minutes: minutes,
+      totalHours: hours + minutes / 60,
+      hmm: hours + ":" + String(minutes).padStart(2, "0"),
+    };
+  }
+
   function parseHmm(text) {
     var raw = String(text == null ? "" : text).trim();
     if (raw === "") return 0;
@@ -103,6 +121,7 @@
     countWorkingDays: countWorkingDays,
     expectedHours: expectedHours,
     parseHmm: parseHmm,
+    parseDurationParts: parseDurationParts,
     formatHmm: formatHmm,
     calculate: calculate,
   };
diff --git a/worktime.test.js b/worktime.test.js
index 28bb3ee..752c999 100644
--- a/worktime.test.js
+++ b/worktime.test.js
@@ -33,6 +33,15 @@ test("start after end is invalid", () => {
   assert.equal(r.error, "range");
 });
 
+test("hours and minutes fields reject minutes over 59", () => {
+  assert.equal(W.parseDurationParts("160", "30").hmm, "160:30");
+  assert.equal(W.parseDurationParts("", "").totalHours, 0);
+  assert.equal(W.parseDurationParts("8", "").totalHours, 8);
+  assert.equal(W.parseDurationParts("0", "45").totalHours, 0.75);
+  assert.equal(W.parseDurationParts("10", "60"), null);
+  assert.equal(W.parseDurationParts("1.5", "0"), null);
+});
+
 test("parse and format h:mm", () => {
   assert.equal(W.parseHmm("160:30"), 160.5);
   assert.equal(W.parseHmm(""), 0);