diff --git a/docs/API.md b/docs/API.md
index 32227de18..20baea457 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -1,17 +1,12 @@
-## Constants
-
-<dl>
-<dt><a href="#createDataAccess">createDataAccess</a> ⇒ <code>object</code></dt>
-<dd><p>Creates a data access object.</p>
-</dd>
-</dl>
-
 ## Functions
 
 <dl>
 <dt><a href="#createClient">createClient(log, dbClient, docClient)</a> ⇒ <code>Object</code></dt>
 <dd><p>Creates a client object for interacting with DynamoDB.</p>
 </dd>
+<dt><a href="#createResponse">createResponse(body, status, headers)</a> ⇒ <code>Response</code></dt>
+<dd><p>Creates a response with a JSON body. Defaults to 200 status.</p>
+</dd>
 <dt><a href="#isArray">isArray(value)</a> ⇒ <code>boolean</code></dt>
 <dd><p>Determines if the given parameter is an array.</p>
 </dd>
@@ -55,20 +50,14 @@ following UTC time offsets format.</p>
 <dt><a href="#arrayEquals">arrayEquals(a, b)</a> ⇒ <code>boolean</code></dt>
 <dd><p>Compares two arrays for equality. Supports primitive array item types only.</p>
 </dd>
+<dt><a href="#dateAfterDays">dateAfterDays(days)</a> ⇒ <code>Date</code></dt>
+<dd><p>Calculates the date after a specified number of days from the current date.</p>
+</dd>
+<dt><a href="#resolveSecretsName">resolveSecretsName(opts, ctx, defaultPath)</a> ⇒ <code>string</code></dt>
+<dd><p>Resolves the name of the secret based on the function version.</p>
+</dd>
 </dl>
 
-<a name="createDataAccess"></a>
-
-## createDataAccess ⇒ <code>object</code>
-Creates a data access object.
-
-**Kind**: global constant  
-**Returns**: <code>object</code> - data access object  
-
-| Param | Type | Description |
-| --- | --- | --- |
-| log | <code>Logger</code> | logger |
-
 <a name="createClient"></a>
 
 ## createClient(log, dbClient, docClient) ⇒ <code>Object</code>
@@ -83,6 +72,20 @@ Creates a client object for interacting with DynamoDB.
 | dbClient | <code>DynamoDB</code> | The AWS SDK DynamoDB client instance. |
 | docClient | <code>DynamoDBDocument</code> | The AWS SDK DynamoDB Document client instance. |
 
+<a name="createResponse"></a>
+
+## createResponse(body, status, headers) ⇒ <code>Response</code>
+Creates a response with a JSON body. Defaults to 200 status.
+
+**Kind**: global function  
+**Returns**: <code>Response</code> - Response.  
+
+| Param | Type | Description |
+| --- | --- | --- |
+| body | <code>object</code> | JSON body. |
+| status | <code>number</code> | Optional status code. |
+| headers | <code>object</code> | Optional headers. |
+
 <a name="isArray"></a>
 
 ## isArray(value) ⇒ <code>boolean</code>
@@ -248,3 +251,40 @@ Compares two arrays for equality. Supports primitive array item types only.
 | a | <code>Array</code> | The first array to compare. |
 | b | <code>Array</code> | The second array to compare. |
 
+<a name="dateAfterDays"></a>
+
+## dateAfterDays(days) ⇒ <code>Date</code>
+Calculates the date after a specified number of days from the current date.
+
+**Kind**: global function  
+**Returns**: <code>Date</code> - A new Date object representing the calculated date after the specified days.  
+**Throws**:
+
+- <code>TypeError</code> If the provided 'days' parameter is not a number.
+- <code>RangeError</code> If the calculated date is outside the valid JavaScript date range.
+
+
+| Param | Type | Description |
+| --- | --- | --- |
+| days | <code>number</code> | The number of days to add to the current date. |
+
+**Example**  
+```js
+// Get the date 7 days from now
+const sevenDaysLater = dateAfterDays(7);
+console.log(sevenDaysLater); // Outputs a Date object representing the date 7 days from now
+```
+<a name="resolveSecretsName"></a>
+
+## resolveSecretsName(opts, ctx, defaultPath) ⇒ <code>string</code>
+Resolves the name of the secret based on the function version.
+
+**Kind**: global function  
+**Returns**: <code>string</code> - - The resolved secret name.  
+
+| Param | Type | Description |
+| --- | --- | --- |
+| opts | <code>Object</code> | The options object, not used in this implementation. |
+| ctx | <code>Object</code> | The context object containing the function version. |
+| defaultPath | <code>string</code> | The default path for the secret. |
+
diff --git a/packages/spacecat-shared-data-access/docs/schema.json b/packages/spacecat-shared-data-access/docs/schema.json
index fc99d3886..ca54d4953 100644
--- a/packages/spacecat-shared-data-access/docs/schema.json
+++ b/packages/spacecat-shared-data-access/docs/schema.json
@@ -218,6 +218,10 @@
           "AttributeName": "auditResult",
           "AttributeType": "M"
         },
+        {
+          "AttributeName": "previousAuditResult",
+          "AttributeType": "M"
+        },
         {
           "AttributeName": "expiresAt",
           "AttributeType": "N"
diff --git a/packages/spacecat-shared-data-access/src/dto/audit.js b/packages/spacecat-shared-data-access/src/dto/audit.js
index e04712058..b1e5152ad 100644
--- a/packages/spacecat-shared-data-access/src/dto/audit.js
+++ b/packages/spacecat-shared-data-access/src/dto/audit.js
@@ -10,6 +10,8 @@
  * governing permissions and limitations under the License.
  */
 
+import { isObject } from '@adobe/spacecat-shared-utils';
+
 import { createAudit } from '../models/audit.js';
 
 function parseEpochToDate(epochInSeconds) {
@@ -28,10 +30,10 @@ export const AuditDto = {
   /**
    * Converts an Audit object into a DynamoDB item.
    * @param {Readonly<Audit>} audit - Audit object.
-   * @param {boolean} latestAudit - If true, returns the latest audit flavor.
+   * @param {boolean} isLatestAudit - If true, returns the latest audit flavor.
    * @returns {{siteId, auditedAt, auditResult, auditType, expiresAt, fullAuditRef, SK: string}}
    */
-  toDynamoItem: (audit, latestAudit = false) => {
+  toDynamoItem: (audit, isLatestAudit = false) => {
     const GSI1PK = 'ALL_LATEST_AUDITS';
     let GSI1SK;
 
@@ -41,7 +43,12 @@ export const AuditDto = {
       GSI1SK = `${audit.getAuditType()}#${Object.values(audit.getScores()).join('#')}`;
     }
 
-    const latestAuditProps = latestAudit ? { GSI1PK, GSI1SK } : {};
+    const latestAuditProps = isLatestAudit ? {
+      GSI1PK,
+      GSI1SK,
+      ...(isObject(audit.getPreviousAuditResult())
+          && { previousAuditResult: audit.getPreviousAuditResult() }),
+    } : {};
 
     return {
       siteId: audit.getSiteId(),
@@ -70,6 +77,8 @@ export const AuditDto = {
       expiresAt: parseEpochToDate(dynamoItem.expiresAt),
       fullAuditRef: dynamoItem.fullAuditRef,
       isLive: dynamoItem.isLive,
+      ...(isObject(dynamoItem.previousAuditResult)
+          && { previousAuditResult: dynamoItem.previousAuditResult }),
     };
 
     return createAudit(auditData);
diff --git a/packages/spacecat-shared-data-access/src/index.d.ts b/packages/spacecat-shared-data-access/src/index.d.ts
index 9d67c7f3d..00cd843e2 100644
--- a/packages/spacecat-shared-data-access/src/index.d.ts
+++ b/packages/spacecat-shared-data-access/src/index.d.ts
@@ -34,6 +34,19 @@ export interface Audit {
    */
   getAuditResult: () => object;
 
+  /**
+   * Retrieves the result of the previous audit.
+   * This serves for comparison purposes.
+   * @returns {object|null} The parsed audit result.
+   */
+  getPreviousAuditResult: () => object | null;
+
+/**
+ * Sets the result of the previous audit.
+ * @param {object} result The parsed audit result.
+ */
+  setPreviousAuditResult: (result: object) => void;
+
   /**
    * Retrieves the type of the audit.
    * @returns {object} The audit type.
diff --git a/packages/spacecat-shared-data-access/src/models/audit.js b/packages/spacecat-shared-data-access/src/models/audit.js
index 827c97a18..1d37499fc 100644
--- a/packages/spacecat-shared-data-access/src/models/audit.js
+++ b/packages/spacecat-shared-data-access/src/models/audit.js
@@ -36,6 +36,10 @@ const validateScores = (auditResult, auditType) => {
     return true;
   }
 
+  if (!isObject(auditResult.scores)) {
+    throw new Error(`Missing scores property for audit type '${auditType}'`);
+  }
+
   const expectedProperties = AUDIT_TYPE_PROPERTIES[auditType];
   if (!expectedProperties) {
     throw new Error(`Unknown audit type: ${auditType}`);
@@ -66,6 +70,11 @@ const Audit = (data = {}) => {
   self.getFullAuditRef = () => self.state.fullAuditRef;
   self.isLive = () => self.state.isLive;
   self.isError = () => hasText(self.getAuditResult().runtimeError?.code);
+  self.getPreviousAuditResult = () => self.state.previousAuditResult;
+  self.setPreviousAuditResult = (previousAuditResult) => {
+    validateScores(previousAuditResult, self.getAuditType());
+    self.state.previousAuditResult = previousAuditResult;
+  };
   self.getScores = () => self.getAuditResult().scores;
 
   return Object.freeze(self);
@@ -98,6 +107,14 @@ export const createAudit = (data) => {
 
   validateScores(data.auditResult, data.auditType);
 
+  if (data.previousAuditResult && !isObject(data.previousAuditResult)) {
+    throw new Error('Previous audit result must be an object');
+  }
+
+  if (data.previousAuditResult) {
+    validateScores(data.previousAuditResult, data.auditType);
+  }
+
   if (!hasText(newState.fullAuditRef)) {
     throw new Error('Full audit ref must be provided');
   }
diff --git a/packages/spacecat-shared-data-access/src/service/audits/accessPatterns.js b/packages/spacecat-shared-data-access/src/service/audits/accessPatterns.js
index f8f781344..aeeb599c5 100644
--- a/packages/spacecat-shared-data-access/src/service/audits/accessPatterns.js
+++ b/packages/spacecat-shared-data-access/src/service/audits/accessPatterns.js
@@ -184,25 +184,40 @@ export const addAudit = async (
   log,
   auditData,
 ) => {
-  const audit = createAudit(auditData);
+  const newAudit = createAudit(auditData);
   const existingAudit = await getAuditForSite(
     dynamoClient,
     config,
     log,
-    audit.getSiteId(),
-    audit.getAuditType(),
-    audit.getAuditedAt(),
+    newAudit.getSiteId(),
+    newAudit.getAuditType(),
+    newAudit.getAuditedAt(),
   );
 
   if (isObject(existingAudit)) {
     throw new Error('Audit already exists');
   }
 
+  const latestAudit = await getLatestAuditForSite(
+    dynamoClient,
+    config,
+    log,
+    newAudit.getSiteId(),
+    newAudit.getAuditType(),
+  );
+
+  if (isObject(latestAudit)) {
+    newAudit.setPreviousAuditResult(latestAudit.getAuditResult());
+  }
+
   // TODO: Add transaction support
-  await dynamoClient.putItem(config.tableNameAudits, AuditDto.toDynamoItem(audit));
-  await dynamoClient.putItem(config.tableNameLatestAudits, AuditDto.toDynamoItem(audit, true));
+  await dynamoClient.putItem(config.tableNameAudits, AuditDto.toDynamoItem(newAudit));
+  await dynamoClient.putItem(
+    config.tableNameLatestAudits,
+    AuditDto.toDynamoItem(newAudit, true),
+  );
 
-  return audit;
+  return newAudit;
 };
 
 /**
diff --git a/packages/spacecat-shared-data-access/test/it/db.test.js b/packages/spacecat-shared-data-access/test/it/db.test.js
index df1594de5..d151900bd 100644
--- a/packages/spacecat-shared-data-access/test/it/db.test.js
+++ b/packages/spacecat-shared-data-access/test/it/db.test.js
@@ -358,6 +358,27 @@ describe('DynamoDB Integration Test', async () => {
     expect(latestAudit.getSiteId()).to.equal(auditData.siteId);
     expect(latestAudit.getAuditType()).to.equal(auditData.auditType);
     expect(latestAudit.getAuditedAt()).to.equal(auditData.auditedAt);
+
+    const additionalAuditData = {
+      siteId: 'https://example1.com',
+      auditType: AUDIT_TYPE_LHS_MOBILE,
+      auditedAt: new Date().toISOString(),
+      isLive: true,
+      fullAuditRef: 's3://ref',
+      auditResult: {
+        scores: {
+          performance: 1,
+          seo: 1,
+          accessibility: 1,
+          'best-practices': 1,
+        },
+      },
+    };
+
+    const anotherAudit = await dataAccess.addAudit(additionalAuditData);
+
+    checkAudit(anotherAudit);
+    expect(anotherAudit.getPreviousAuditResult()).to.deep.equal(newAudit.getAuditResult());
   });
 
   it('throws an error when adding a duplicate audit', async () => {
diff --git a/packages/spacecat-shared-data-access/test/unit/models/audit.test.js b/packages/spacecat-shared-data-access/test/unit/models/audit.test.js
index f82b01d4c..4f65a999a 100644
--- a/packages/spacecat-shared-data-access/test/unit/models/audit.test.js
+++ b/packages/spacecat-shared-data-access/test/unit/models/audit.test.js
@@ -48,6 +48,21 @@ describe('Audit Model Tests', () => {
       expect(() => createAudit({ ...validData, auditResult: 'not-an-object' })).to.throw('Audit result must be an object');
     });
 
+    it('throws an error if previous audit result is not an object', () => {
+      expect(() => createAudit({ ...validData, previousAuditResult: 'not-an-object' }))
+        .to.throw('Previous audit result must be an object');
+    });
+
+    it('throws an error if previous audit result is missing scores property', () => {
+      expect(() => createAudit({ ...validData, previousAuditResult: {} }))
+        .to.throw('Missing scores property for audit type \'lhs-mobile\'');
+    });
+
+    it('throws an error if previous audit result is invalid', () => {
+      expect(() => createAudit({ ...validData, previousAuditResult: { scores: {} } }))
+        .to.throw('Missing expected property \'performance\' for audit type \'lhs-mobile\'');
+    });
+
     it('throws an error if fullAuditRef is not provided', () => {
       expect(() => createAudit({ ...validData, fullAuditRef: '' })).to.throw('Full audit ref must be provided');
     });
@@ -62,6 +77,13 @@ describe('Audit Model Tests', () => {
       expect(audit.getAuditType()).to.equal(validData.auditType.toLowerCase());
       expect(audit.getAuditResult()).to.deep.equal(validData.auditResult);
       expect(audit.getFullAuditRef()).to.equal(validData.fullAuditRef);
+      expect(audit.getPreviousAuditResult()).to.be.undefined;
+    });
+
+    it('throws an error when updating with invalid previous audit', () => {
+      const audit = createAudit(validData);
+
+      expect(() => audit.setPreviousAuditResult({})).to.throw('Missing scores property for audit type \'lhs-mobile\'');
     });
 
     it('automatically sets expiresAt if not provided', () => {
diff --git a/packages/spacecat-shared-data-access/test/unit/service/audits/index.test.js b/packages/spacecat-shared-data-access/test/unit/service/audits/index.test.js
index 07317a948..d2362525e 100644
--- a/packages/spacecat-shared-data-access/test/unit/service/audits/index.test.js
+++ b/packages/spacecat-shared-data-access/test/unit/service/audits/index.test.js
@@ -166,7 +166,7 @@ describe('Audit Access Pattern Tests', () => {
     let exportedFunctions;
 
     const auditData = {
-      siteId: 'siteId',
+      siteId: 'site1',
       auditType: 'lhs-mobile',
       auditedAt: new Date().toISOString(),
       auditResult: {
@@ -204,6 +204,40 @@ describe('Audit Access Pattern Tests', () => {
       expect(result.getAuditResult()).to.deep.equal(auditData.auditResult);
       expect(result.getFullAuditRef()).to.equal(auditData.fullAuditRef);
       expect(result.getScores()).to.be.an('object');
+      expect(result.getPreviousAuditResult()).to.be.undefined;
+    });
+
+    it('successfully adds a new audit with a previous audit result', async () => {
+      const auditResult = {
+        scores: {
+          performance: 0.2,
+          seo: 0.3,
+          accessibility: 0.4,
+          'best-practices': 0.5,
+        },
+      };
+      mockDynamoClient.getItem.withArgs(TEST_DA_CONFIG.tableNameLatestAudits, {
+        siteId: 'site1',
+        auditType: 'lhs-mobile',
+      }).resolves({ ...auditData, auditResult });
+
+      const result = await exportedFunctions.addAudit(auditData);
+
+      // Once for 'audits' and once for 'latest_audits'
+      expect(mockDynamoClient.putItem.calledTwice).to.be.true;
+      // Once for 'audits' and once for 'latest_audits'
+      expect(mockDynamoClient.getItem.calledTwice).to.be.true;
+      expect(result.getSiteId()).to.equal(auditData.siteId);
+      expect(result.getAuditType()).to.equal(auditData.auditType);
+      expect(result.getAuditedAt()).to.equal(auditData.auditedAt);
+      expect(result.getAuditResult()).to.deep.equal(auditData.auditResult);
+      expect(result.getFullAuditRef()).to.equal(auditData.fullAuditRef);
+      expect(result.getScores()).to.be.an('object');
+      expect(result.getPreviousAuditResult()).to.be.an('object');
+      expect(result.getPreviousAuditResult().scores.performance).to.equal(0.2);
+      expect(result.getPreviousAuditResult().scores.seo).to.equal(0.3);
+      expect(result.getPreviousAuditResult().scores.accessibility).to.equal(0.4);
+      expect(result.getPreviousAuditResult().scores['best-practices']).to.equal(0.5);
     });
 
     it('successfully adds an error audit', async () => {