Comparison

KiwiCal 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

KiwiCal

This app helps you track your calorie and nutrient intake with a focus on simplicity and aesthetics. Answer lifestyle questions to create a personalized plan and easily log meals by taking photos for nutritional analysis. It aims to empower users to achieve their weight loss goals with minimal effort.

Highlights
  • Personalized lifestyle plans
  • Photo-based meal logging
  • Nutritional breakdown analysis
  • Weight loss support
  • Minimal time commitment
  • Body confidence empowerment
Features
Read full description

HOW TO USE KIWICAL: 1) Answer lifestyle questions to build your plan 2) Snap a photo of your meal* 3) Get your nutritional breakdown* If you want to lose weight, KiwiCal will help you get there with less time spent than anyone else. We aren't another complicated diet app. We want to empower everyone to be confident in their bodies with minimal time spent, but you have to work hard. We will support you and give you the tools and information you need. If you have any ideas or questions, please email us at founders@naturalui.com. NOTE: We do not offer medical advice. Any and all recommendations should be viewed as suggestions, please consult with a professional and do your own research before trying a new calorie and nutrient plan. *FOOD SCANNING ANALYSIS RESULTS REQUIRE A SUBSCRIPTION. TERMS: https://naturalui.com/healthreset/terms

About

Private Diary

Features
Read full description

Scriptum is a daily journal with no account and no server. Your writing stays on your phone, and nothing leaves it unless you ask it to. ONE PAGE A DAY • A question is waiting each morning, so you never open to a blank page. • Write a line or a thousand words. The day is one page, of any length. • Missed a day? Open the calendar and write it whenever you like. WRITE HOWEVER SUITS YOU • Type, or speak and watch your words land on the page. • Add a photograph to remember the day by. • Note where you were, when that is part of it. FIND IT AGAIN YEARS LATER • Search every entry you have ever written. • A calendar of the days you wrote, and the days you did not. • Open any date and read it exactly as you left it. PRIVATE, NOT MERELY ENCRYPTED • No account. Nothing to sign up for, nothing to sign in to. • No analytics, no trackers, no advertising inside the app. • Most diaries keep your writing on a server. This one has no server to keep it on. AND STILL IMPOSSIBLE TO LOSE • A copy of your journal is kept in your own iCloud, so deleting the app no longer takes it with it. • Nothing is sent to us. The copy sits in your iCloud Drive, where you can see it. • Or save the whole diary, words and photographs, as one file only you hold. SCRIPTUM COMPLETE An optional upgrade, for when the free journal is not enough. • Lock your diary behind Face ID, a fingerprint, or a passcode. • Up to ten photos on a page, arranged for you. • Sketch over the paper in ink. • Stickers to decorate a page, every pack of them. • Have a rambling entry tidied by AI into something you will want to reread. • Colour the whole app to suit you. • Turn your journal into a printable PDF book, typeset page by page. Scriptum Complete is offered monthly or yearly, or as Lifetime, a one-off purchase. Subscriptions renew automatically until cancelled. Lifetime does not renew. Terms of Use: https://annrstudio.com/scriptum/terms/ Privacy Policy: https://annrstudio.com/scriptum/privacy/

Screenshots

KiwiCal3 screens
Private Diary4 screens

Verdict

The call

KiwiCal and Private Diary are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. KiwiCal sells 2 in-app purchases, starting at $29.99 per year and Private Diary sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

KiwiCal ships an update every 10 days, Private Diary weekly. The most recent releases landed on August 22, 2026 and September 17, 2026 respectively.

ScorecardNo meaningful differences
KiwiCal versus Private Diary: the parameters behind the verdict, then further details
ParameterKiwiCalPrivate Diary
PriceFreeFree
Rating3.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 10 daysWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS1615.1 — better
Further details — not scored
Size32 MB42 MB
Age rating4+4+
DeveloperNaturalUI Inc.ANNR Studio

In-app purchases

2 purchases

KiwiCal

Subscriptions2
  • Annual3 Days trial$29.991 Year
  • Yearly3 Days trial$39.991 Year
3 purchases

Private Diary

Subscriptions2
  • Monthly$2.991 Month
  • Yearly$17.991 Year
One-time1
  • Lifetime$34.99

Questions

Is KiwiCal free?
KiwiCal is free to download, with in-app purchases available.
Is Private Diary free?
Private Diary is free to download, with in-app purchases available.
Do KiwiCal or Private Diary have ads?
Neither KiwiCal nor Private Diary shows ads.
Which is updated more often, KiwiCal or Private Diary?
KiwiCal ships an update every 10 days, and Private Diary weekly. Most recently, KiwiCal was updated on August 22, 2026 and Private Diary on September 17, 2026.

Other comparisons