Comparison

Exchange Message vs Private Diary

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

Head to head
About

Exchange Message

This app provides tools to guide Christians in sharing their faith. It focuses on the concept of "The Exchange" – Jesus taking on sin in exchange for salvation. It aims to help believers fulfill the Christian call to evangelism.

Highlights
  • Guidance for sharing faith
  • Tools for ministry
  • Explains 'The Exchange' concept
  • Focuses on evangelism
Features
Read full description

Having a relationship with Jesus is the most precious treasure you can ever possess. But simply knowing Jesus for yourself is not what Christ called us to. The Bible clearly teaches us that once we trust Jesus to forgive our sins and save us from a punishment that we deserve, we are compelled to share the good news with others. To make this command real in our ministry, we've crafted a series of tools to guide believers through this Circle of Ministry. One of those tools is The Exchange. Jesus is the Son of God. He came to earth, lived a perfect life, and died in our place to save you and me from our sin. When you trust Jesus to pay the price of your sin, you become a child of God - the start of a real relationship with Him. This is the cornerstone of the Bible and our ministry. We call this The Exchange - when Jesus exchanges our sinful record with his personal, perfect sacrifice.

About

Private Diary

This app provides a secure, private space for journaling with a unique decoy password feature. All entries are stored locally, ensuring your secrets remain yours alone. Enjoy a minimalist writing experience designed for focus and privacy.

Highlights
  • Decoy passcode for dual-access privacy
  • 100% local offline storage
  • Typewriter-style writing experience
  • Minimalist black-and-white UI
  • No internet access or cloud storage
  • Ad-free experience
Features
Read full description

Decoy‑Passcode Private Diary. You are the sole keeper of your secrets. Enter your dummy passcode under coercion, and a “safe” fake diary will be displayed. All data is stored 100% locally. No internet access, no cloud storage and zero ads. Core Features Decoy Passcode: Dual‑password dual‑storage space for rock‑solid privacy (In‑App Purchase) Typewriter‑style writing experience with centered cursor for undistracted immersion Minimalist black‑and‑white UI paired with Georgia serif font Offline‑only local storage; none of your data gets uploaded anywhere Full‑Version ($1.99 One‑Time Purchase, Lifetime Access) Unlimited diary entries Decoy‑passcode lock (Photo attachments, encrypted export and search feature are in‑development and will be added upon release) No subscriptions, no advertisements, no cloud‑server sync.

Screenshots

Exchange Message4 screens
Private Diary3 screens

Verdict

The call

The clearest difference is update cadence: Private Diary at every 3 weeks against Exchange Message's every 4 months. Exchange Message's advantage is ratings volume (129 vs 2). On price, rating, review sentiment and ads 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Exchange Message against 5.0 for Private Diary. That said, the two scores are not equally well evidenced: Exchange Message has 129 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 98% of Exchange Message's written reviews are positive against 100% of Private Diary's.

UpkeepUpdate frequency

Exchange Message ships an update every 4 months, Private Diary every 3 weeks. The most recent releases landed on October 22, 2026 and October 11, 2026 respectively.

Scorecard2 real differences · 8 level
Exchange Message versus Private Diary: the parameters behind the verdict, then further details
ParameterExchange MessagePrivate Diary
PriceFreeFree
Rating5.0 (129 ratings)5.0 (2 ratings) — better
Positive reviews98.2% of reviews100.0% of reviews — better
Number of ratings129 — better2
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.6
Further details — not scored
Size51 MB1 MB
Age rating4+4+
DeveloperEXCHANGE, THEQuanhong Zhao

Customer experience

Exchange Message

All ratings126 ratings
Positive99.2%
Neutral0.0%
Negative0.8%
Written reviews55 reviews
Positive98.2%
Neutral0.0%
Negative1.8%

Private Diary

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Exchange Message

Reported bugs

2 issues
  • Digital orders not received after syncing
  • Unable to contact support for order issues

Requested features

1 request
  • Support for Spanish language

Private Diary

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Exchange Message

No in-app purchases

None

Private Diary

No in-app purchases

Questions

Is Exchange Message free?
Exchange Message is free to download, with no in-app purchases.
Is Private Diary free?
Private Diary is free to download, with no in-app purchases.
Which has better reviews, Exchange Message or Private Diary?
Private Diary is rated higher. Exchange Message averages 5.0 out of 5 from 129 ratings, while Private Diary averages 5.0 from 2 ratings.
Do Exchange Message or Private Diary have ads?
Neither Exchange Message nor Private Diary shows ads.
Which is updated more often, Exchange Message or Private Diary?
Exchange Message ships an update every 4 months, and Private Diary every 3 weeks. Most recently, Exchange Message was updated on October 22, 2026 and Private Diary on October 11, 2026.

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