Comparison

Birthday assistant app vs SOLAR

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

Head to head
About

Birthday assistant app

This app helps you remember important dates like birthdays, anniversaries, and festivals. It sends automatic reminders and offers tools for sending greeting cards and invitations, ensuring you never miss a special occasion.

Highlights
  • Birthday reminders
  • Lunar calendar support
  • Countdown timers
  • Greeting card creation
  • Invitation sending
  • Photo book integration
  • 7-day weather forecast
Features
Read full description

Birthday reminder assistant is a kind of thoughtful birthday reminder tool, which can be used for birthday, memorial day, countdown day and festival. It supports birthday and date reminders of lunar calendar. Each passing day is worth remembering. When the birthday comes, it will automatically remind you whether to send birthday cards and invitations to your friends, so that you can commemorate and participate in every important festival together. Whether it's friends, classmates or relatives, you can use this birthday reminder assistant tool, or you can print the photos after the party into a meaningful book, leaving a good memory. Birthday reminder assistant integrates birthday reminder, birthday countdown, birthday greeting card, anniversary invitation, countdown and other contents, and can view 7-day weather forecast and other functions. From birthday reminder to birthday blessing, birthday greeting card, customized birthday video, birthday invitation letter, birthday photo book, customized birthday gift, customized birthday gift and other one-stop birthday butler services, let you calmly deal with friends or your own birthday, important anniversary and so on.

About

SOLAR

Features
Read full description

Know how much daylight is left. Find golden hour. See where the Sun and Moon will be. SOLAR brings the changing sky to your iPhone. Check the light before a walk, choose a moment for a photo, or slide through the day and watch morning become night. MAKE THE MOST OF DAYLIGHT See sunrise, solar noon and sunset for your chosen place, with a countdown to the next sunrise or sunset. Explore golden hour, blue hour and the stages of twilight. EXPLORE A DAY. OR A SEASON. Move through the hours to follow the Sun and Moon. Check the Moon’s phase, reveal their paths, and explore how the Sun’s position changes through the year. A changing sky, drifting clouds and an animated sea bring the view to life. Choose which visual layers to show. FOUR WAYS TO READ TIME Read familiar Local Time or switch to Solar Time, where 12:00 is local solar noon. Try Seasonal Hours, which divide daylight and night into twelve parts each, with hour lengths that change through the year. Or discover Byzantine Time, with equal-length hours counted from sunset. A REMINDER TO LOOK UP Set reminders for sunrise, sunset, golden hour and other solar events. Choose when to be notified and which days to include. FIND THE SUN AND MOON On supported iPhones, use augmented reality to see the calculated positions of the Sun and Moon over your camera view. In AR, Sky shows the whole sky around you with a light score: the share of the year’s direct sun that reaches your spot, under a clear sky. The shadow tool shows where an object’s shadow falls. With Aim, point at a landmark and tap to find when the Sun or Moon lines up with it. THE DAY, AT A GLANCE Add widgets for solar time, daylight and the Moon to your Home Screen or Lock Screen. On Apple Watch, check today’s solar events and add the next sunrise or sunset to your watch face. SHARE THE LIGHT Share a sky image from the moment you’re exploring. No account. No ads. Core solar calculations run on your device. The illustrated sky, clouds and sea are visualizations, not a live view of your surroundings. AR requires a compatible iPhone, camera access and location permission.

Screenshots

Birthday assistant app4 screens
SOLAR4 screens

Verdict

The call

The clearest difference is price: Birthday assistant app at Free against SOLAR's $2.99. Birthday assistant app also leads on iOS requirement (15.6 vs 18.0). SOLAR's advantage is in-app purchases (none vs 1). On update cadence, ads 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

Birthday assistant app is free to download; SOLAR costs $2.99 up front. Birthday assistant app sells 1 one-off in-app purchase. SOLAR asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

Scorecard3 real differences · 6 level
Birthday assistant app versus SOLAR: the parameters behind the verdict, then further details
ParameterBirthday assistant appSOLAR
PriceFree — better$2.99
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyFortnightlyFortnightly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS15.6 — better18.0
Further details — not scored
Size70 MB25 MB
Age rating4+4+
Developer小花 邓timothe marcellin

In-app purchases

1 purchases

Birthday assistant app

One-time1
  • 一年会员功能使用购买$5.99
None

SOLAR

No in-app purchases

Questions

Is Birthday assistant app free?
Birthday assistant app is free to download, with in-app purchases available.
Is SOLAR free?
SOLAR costs $2.99, with no in-app purchases.
Do Birthday assistant app or SOLAR have ads?
Neither Birthday assistant app nor SOLAR shows ads.
Which is updated more often, Birthday assistant app or SOLAR?
Birthday assistant app ships an update fortnightly, and SOLAR fortnightly. Most recently, Birthday assistant app was updated on November 3, 2026 and SOLAR on November 6, 2026.

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