Comparison

US Historical Documents vs Private Notes Lock

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

US Historical Documents

Access over 400 influential U.S. historical documents, laws, speeches, and court cases. This app allows you to search, annotate, highlight, and email documents, all stored locally for offline access.

Highlights
  • Over 400 historical documents
  • Offline document storage
  • Searchable content
  • Add notes and highlights
  • Email documents
  • Sort by date or type
Features
Currently charting
Read full description

This app contains over 400 of the most influential documents, laws, speeches, and court cases in U.S. history. See the dramatic items which shaped our nation’s history in this extremely readable and convenient format. Sort the documents chronologically or by type of document and importance. Search for words or phrases in all documents, or in specific documents. Besides just reading documents, this app has many useful features, available on an easy-to-use graphical toolbar. Includes: -Add (and remove) notes anywhere in the document -Highlight useful words or phrases -Email any documents (including your notes) -Save your changes for later viewing -Remove customization and go back to "original" document All documents are stored locally on your iPhone / iPad, for easy reference. Includes: -U.S. Constitution -Declaration of Independence -Articles of Confederation -Complete collection of the Anti-Federalist Papers -Complete collection of the Federalist Papers -Many more Colonial, pre-colonial, and founding fathers’ documents. -Confederate Constitution -Gettysburg Address -Star Spangled Banner -Important Federal Laws (including Federal Judiciary Act, Alien and Sedition Acts, Interstate Commerce Act , Lend-Lease Act , and many more) -Important Speeches by Presidents and other leaders (including Ronald Reagan, John F. Kennedy, Patrick Henry, Martin Luther King, Abraham Lincoln, and more) -Complete collection of every presidential inauguration speech -Important Civil Rights milestones (including Emancipation Proclamation, Civil Rights Act and more) -War documents (including Declaration of War in WWI and WWII, Surrender of Japan, Surrender of Germany, and more) -Famous Court Cases (including Brown v. Board of Education, Marbury v. Madison, Miranda v. Arizona, District of Columbia v. Heller, and more) -Treaties shaping our nation’s history (including Treaty of Paris, Treaty of Guadalupe Hidalgo, Treaty of Fort Laramie, and more) -Influential Executive Orders (Desegregation, Peace Corps, and more) -MANY MORE DOCUMENTS!

About

Private Notes Lock

Securely store your written and voice notes with a passcode or Touch ID. This app allows you to create, save, and play notes, with options to add multiple photos. Manual data backup is recommended.

Highlights
  • Passcode protection
  • Touch ID access
  • Create written notes
  • Save audio notes
  • Add multiple photos to notes
  • Play audio notes
Features
Read full description

Are you worry about your written notes? Are you worry about your voice notes? Than This app is for you. Easy way to save and secure , secrete your notes in to your phone also save a voice notes and secure in to your phone. Feature - Set a passcode for open an app this is secure your notes. - Create a notes - Save a notes into multiple photos - Create a audio notes - Save a notes and play a notes - Change passcode - Also access to use Touch ID for use this app **Important Notice – Data Backup** This app does not provide built-in cloud or automatic backup functionality. To back up your data, please connect your device to a computer and use iTunes (or Finder on macOS) to access the app’s files and export them manually. We strongly recommend regularly backing up your data to avoid any potential data loss. The developer is not responsible for loss of data due to device issues, deletion, or app removal. Hurry Download app now

Screenshots

US Historical Documents4 screens
Private Notes Lock4 screens

Verdict

The call

The clearest difference is price: Private Notes Lock at Free against US Historical Documents's $0.99. Private Notes Lock also leads on update cadence (every 4 months vs every 15 months). US Historical Documents's advantage is rating (4.6 vs 3.0) and review sentiment (75% vs 33%). On in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Private Notes Lock is free to download; US Historical Documents costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

US Historical Documents holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: US Historical Documents has 20 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 75% of US Historical Documents's written reviews are positive against 33% of Private Notes Lock's.

UpkeepUpdate frequency

US Historical Documents ships an update every 15 months, Private Notes Lock every 4 months. The most recent releases landed on September 9, 2026 and June 7, 2026 respectively.

Scorecard9 real differences · 2 level
US Historical Documents versus Private Notes Lock: the parameters behind the verdict, then further details
ParameterUS Historical DocumentsPrivate Notes Lock
Price$0.99Free — better
Rating4.6 (20 ratings) — better3.0 (4 ratings)
Positive reviews75.0% of reviews — better33.3% of reviews
Number of ratings20 — better4
Update frequencyEvery 15 monthsEvery 4 months — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaidAd-supported — better
Best chart rank#196 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS9.0 — better14.0
Further details — not scored
Size19 MB7 MB
Age rating4+4+
DeveloperWorkman Consulting LLCBhargav Narola

Customer experience

US Historical Documents

All ratings20 ratings
Positive90.0%
Neutral5.0%
Negative5.0%
Written reviews12 reviews
Positive75.0%
Neutral8.3%
Negative16.7%

Private Notes Lock

All ratings4 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews6 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

None

US Historical Documents

No in-app purchases

None

Private Notes Lock

No in-app purchases

Questions

Is US Historical Documents free?
US Historical Documents costs $0.99, with no in-app purchases.
Is Private Notes Lock free?
Private Notes Lock is free to download, with no in-app purchases.
Which has better reviews, US Historical Documents or Private Notes Lock?
US Historical Documents is rated higher. US Historical Documents averages 4.6 out of 5 from 20 ratings, while Private Notes Lock averages 3.0 from 4 ratings.
Do US Historical Documents or Private Notes Lock have ads?
Private Notes Lock shows ads; US Historical Documents does not.
Which is updated more often, US Historical Documents or Private Notes Lock?
US Historical Documents ships an update every 15 months, and Private Notes Lock every 4 months. Most recently, US Historical Documents was updated on September 9, 2026 and Private Notes Lock on June 7, 2026.

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