diff --git a/frontend/src/history.ts b/frontend/src/history.ts
index d8a8fd792..96dac7631 100644
--- a/frontend/src/history.ts
+++ b/frontend/src/history.ts
@@ -683,8 +683,8 @@ function providerCell(p: HistoryPurchase): string {
 function upfrontCell(p: HistoryPurchase, amortize: boolean): string {
   const amount = formatCurrency(p.upfront_cost);
   const folded = amortize && p.monthly_cost != null && p.upfront_cost != null && p.upfront_cost > 0 && p.term > 0;
-  if (!folded) return `<td class="num">${amount}</td>`;
-  return `<td class="num upfront-in-monthly" title="Included in the amortized monthly cost">${amount}<div class="upfront-in-monthly-note">(in monthly)</div></td>`;
+  if (!folded) return `<td class="num" data-label="Upfront Cost">${amount}</td>`;
+  return `<td class="num upfront-in-monthly" data-label="Upfront Cost" title="Included in the amortized monthly cost">${amount}<div class="upfront-in-monthly-note">(in monthly)</div></td>`;
 }
 
 // canCancelPendingRow returns true when the current session is permitted
@@ -1408,18 +1408,18 @@ function renderHistoryList(purchases: HistoryPurchase[]): void {
     const dashOr = (html: string): string => (empty ? MUTED_DASH : html);
     return `
       <tr${execIdAttr}>
-        <td>${statusCell}</td>
-        <td>${formatDate(p.timestamp)}</td>
-        <td>${providerCell(p)}</td>
-        <td>${dashOr(escapeHtml(p.service))}</td>
-        <td>${empty ? NO_RECS_HTML : escapeHtml(p.resource_type)}</td>
-        <td>${dashOr(escapeHtml(p.region))}</td>
-        <td class="num">${dashOr(escapeHtml(String(p.count ?? '')))}</td>
-        <td>${termCell(p)}</td>
-        ${empty ? `<td class="num">${MUTED_DASH}</td>` : upfrontCell(p, amortize)}
-        <td class="num">${dashOr(monthlyCostCell)}</td>
-        <td class="num savings">${dashOr(formatCurrency(p.estimated_savings))}</td>
-        <td>${planCellContent}</td>
+        <td data-label="Status">${statusCell}</td>
+        <td data-label="Date">${formatDate(p.timestamp)}</td>
+        <td data-label="Provider">${providerCell(p)}</td>
+        <td data-label="Service">${dashOr(escapeHtml(p.service))}</td>
+        <td data-label="Type">${empty ? NO_RECS_HTML : escapeHtml(p.resource_type)}</td>
+        <td data-label="Region">${dashOr(escapeHtml(p.region))}</td>
+        <td class="num" data-label="Count">${dashOr(escapeHtml(String(p.count ?? '')))}</td>
+        <td data-label="Term">${termCell(p)}</td>
+        ${empty ? `<td class="num" data-label="Upfront Cost">${MUTED_DASH}</td>` : upfrontCell(p, amortize)}
+        <td class="num" data-label="${amortize ? 'Monthly Cost (amortized)' : 'Monthly Cost'}">${dashOr(monthlyCostCell)}</td>
+        <td class="num savings" data-label="Monthly Savings">${dashOr(formatCurrency(p.estimated_savings))}</td>
+        <td data-label="Plan">${planCellContent}</td>
       </tr>
     `;
   }).join('');
@@ -1430,7 +1430,7 @@ function renderHistoryList(purchases: HistoryPurchase[]): void {
   );
   const markup = `
     ${buildStatusChipRowHTML(purchases, activeStatusFilter)}
-    <table class="table-compact table-sticky-end">
+    <table class="table-compact table-sticky-end table-cards-mobile">
       <thead>
         <tr>
           <th>Status</th>
@@ -2046,18 +2046,18 @@ export function renderApprovalQueue(purchases: HistoryPurchase[]): void {
     const execIdAttr = p.purchase_id ? ` data-execution-id="${escapeHtmlAttr(p.purchase_id)}"` : '';
     return `
       <tr${execIdAttr}>
-        <td>${formatDate(p.timestamp)}</td>
-        <td>${accountCell}</td>
-        <td>${providerCell(p)}</td>
-        <td>${empty ? NO_RECS_HTML : escapeHtml(p.service)}</td>
-        <td class="num">${dashOr(escapeHtml(String(p.count ?? '')))}</td>
-        <td>${termCell(p)}</td>
-        <td>${dashOr(paymentCell)}</td>
-        <td class="num">${dashOr(monthlyCostCell)}</td>
-        ${empty ? `<td class="num">${MUTED_DASH}</td>` : upfrontCell(p, amortize)}
-        <td class="num savings">${dashOr(formatCurrency(p.estimated_savings))}</td>
-        <td>${createdBy}</td>
-        <td>${actionsCell}</td>
+        <td data-label="Date">${formatDate(p.timestamp)}</td>
+        <td data-label="Account">${accountCell}</td>
+        <td data-label="Provider">${providerCell(p)}</td>
+        <td data-label="Service">${empty ? NO_RECS_HTML : escapeHtml(p.service)}</td>
+        <td class="num" data-label="Count">${dashOr(escapeHtml(String(p.count ?? '')))}</td>
+        <td data-label="Term">${termCell(p)}</td>
+        <td data-label="Payment">${dashOr(paymentCell)}</td>
+        <td class="num" data-label="${amortize ? 'Monthly Cost (amortized)' : 'Monthly Cost'}">${dashOr(monthlyCostCell)}</td>
+        ${empty ? `<td class="num" data-label="Upfront Cost">${MUTED_DASH}</td>` : upfrontCell(p, amortize)}
+        <td class="num savings" data-label="Monthly Savings">${dashOr(formatCurrency(p.estimated_savings))}</td>
+        <td data-label="Created By">${createdBy}</td>
+        <td data-label="Actions">${actionsCell}</td>
       </tr>
     `;
   }).join('');
@@ -2069,7 +2069,7 @@ export function renderApprovalQueue(purchases: HistoryPurchase[]): void {
     col, APPROVAL_QUEUE_LABELS[col], colFilters[col] != null, APPROVAL_QUEUE_FILTER_SCOPE,
   );
   container.innerHTML = `
-    <table class="approval-queue-table table-compact table-sticky-end">
+    <table class="approval-queue-table table-compact table-sticky-end table-cards-mobile">
       <thead>
         <tr>
           <th>Date</th>
diff --git a/frontend/src/styles/tables.css b/frontend/src/styles/tables.css
index 62d38b3a4..5a3b051a9 100644
--- a/frontend/src/styles/tables.css
+++ b/frontend/src/styles/tables.css
@@ -699,3 +699,121 @@ th .history-column-filter-btn:focus-visible {
 .savings-stripe-swatch--medium {
     background: var(--cudly-warn);
 }
+
+/* Phones: the approval queue and purchase history (.table-cards-mobile)
+ * turn each row into a card of label / value lines (labels from the
+ * cells' data-label), so nothing hides behind a sideways scroll. The
+ * header row stays as a wrap of chips for the columns that have a filter
+ * funnel, so filtering still works; the other header cells are hidden. */
+@media (max-width: 640px) {
+    .table-cards-mobile,
+    .table-cards-mobile thead,
+    .table-cards-mobile tbody,
+    .table-cards-mobile tr,
+    .table-cards-mobile td {
+        display: block;
+    }
+
+    .table-cards-mobile {
+        margin-top: var(--cudly-sp-2);
+        background: transparent;
+        box-shadow: none;
+        border-radius: 0;
+        overflow: visible;
+    }
+
+    .table-cards-mobile thead tr {
+        display: flex;
+        flex-wrap: wrap;
+        gap: var(--cudly-sp-1);
+        margin-bottom: var(--cudly-sp-2);
+    }
+
+    .table-cards-mobile thead tr:hover {
+        background: transparent;
+    }
+
+    .table-cards-mobile thead th {
+        display: inline-flex;
+        align-items: center;
+        position: static;
+        padding: 0 0 0 var(--cudly-sp-2);
+        border: 1px solid var(--cudly-border);
+        border-radius: var(--cudly-r-full);
+        background: var(--cudly-surface);
+    }
+
+    .table-cards-mobile thead th:not(:has(button)) {
+        display: none;
+    }
+
+    /* Each card is a three-column grid of label-over-value fields; long
+     * values (account, creator, type) take two columns. */
+    .table-cards-mobile.table-compact tbody tr {
+        display: grid;
+        grid-template-columns: repeat(3, minmax(0, 1fr));
+        grid-auto-flow: row dense;
+        gap: var(--cudly-sp-2) var(--cudly-sp-3);
+        margin-bottom: var(--cudly-sp-2);
+        padding: var(--cudly-sp-3);
+        border: 1px solid var(--cudly-border);
+        border-radius: var(--cudly-r-md);
+        background: var(--cudly-surface);
+    }
+
+    .table-cards-mobile.table-compact tbody td {
+        display: flex;
+        flex-direction: column;
+        align-items: flex-start;
+        gap: 0;
+        position: static;
+        min-width: 0;
+        overflow-wrap: anywhere;
+        padding: 0;
+        border: 0;
+        background: transparent;
+        text-align: left;
+        white-space: normal;
+    }
+
+    .table-cards-mobile.table-compact tbody td::before {
+        content: attr(data-label);
+        position: static;
+        width: auto;
+        opacity: 1;
+        background: none;
+        max-width: 100%;
+        overflow: hidden;
+        color: var(--cudly-text-subtle);
+        font-size: var(--cudly-fs-xs);
+        text-overflow: ellipsis;
+        white-space: nowrap;
+    }
+
+    /* Status (history) leads the card and the actions / plan cell closes
+     * it, each across the full width. */
+    .table-cards-mobile.table-compact tbody td:is([data-label="Status"], :last-child) {
+        grid-column: 1 / -1;
+    }
+
+    .table-cards-mobile.table-compact tbody td:is([data-label="Account"], [data-label="Created By"], [data-label="Type"]) {
+        grid-column: span 2;
+    }
+
+    .table-cards-mobile.table-compact tbody td[data-label="Status"]::before {
+        content: none;
+    }
+
+    .table-cards-mobile.table-compact tbody td:last-child {
+        padding-top: var(--cudly-sp-2);
+        border-top: 1px solid var(--cudly-border);
+    }
+
+    .table-cards-mobile.table-compact tbody td:last-child::before {
+        content: none;
+    }
+
+    .table-cards-mobile .cell-truncate {
+        max-width: 100%;
+    }
+}