Comparison

MOON vs Vow Prep

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

Head to head
About

MOON

Features
Read full description

MOON-月亮&看月亮月球表面是您探索夜空的理想伴侣。无论您是对天文学感兴趣的专业爱好者还是想要欣赏月相变化的普通观星者,这款应用都提供了简便而强大的功能,带您进入壮丽的星空世界。 1. 实时月相:获取准确的实时月相信息,包括新月、上弦月、满月和下弦月等,帮助您了解当前月亮的状态。 2. 星座导航:识别夜空中的星座和行星,应用的导航功能将带您穿越星空,认识各种天体。 3. 观星计划:制定您的观星计划,包括不同日期和地点的月亮和星座观测,提前知道星空的精彩瞬间。 4. AR增强现实:利用增强现实技术,将星星、行星和月亮投影在您的手机屏幕上,提供身临其境的观星体验。 5. 历史数据:查看过去月相的历史记录,了解月亮的变化规律。 6. 天文事件提醒:获得有关日食、月食和其他天文事件的提醒,不再错过任何重要时刻。 让您的夜晚更富有趣味,享受探索夜空的美妙之旅! 订阅: 1、 用户只有在通过付费订阅后才可以无限次使用moon全部功能,去除广告等功能; 2、订阅费用会在用户确认购买时从 iTunes 账户扣除,可自动续订,续费¥198/年; 3、用户可在当前订阅结束 24 小时前关闭自动续订,否则将自动续订; 4、自动续期订阅的 Apple ID,会在每个账单周期到期前24小时,自动在iTunes账户扣费并延长相应有效期; 5、用户对订阅服务进行管理,即购买后可以前往用户账户设置关闭自动订阅。 用户协议:https://docs.qq.com/doc/DUERMSmVFcHFWUE9p 隐私政策:https://docs.qq.com/doc/DUHRQb0FmenplTUd3

About

Vow Prep

This app helps couples about to commit to a life together have essential conversations about their future. It offers guided discussions across various life topics, allowing partners to answer privately and then compare responses to foster open communication.

Highlights
  • Guided conversation cards
  • 9 topic decks
  • Private answering
  • Side-by-side answer comparison
  • One-time purchase
  • No subscription required
Features
Read full description

We plan the wedding — never the life. Vow Prep is for two people about to build a life together: engaged, moving in, getting a PACS, or simply committing for real. Before you merge two lives, there are conversations worth having — honestly, and out loud. Playful, but real. Swipe through beautifully written cards across 9 decks that sweep every corner of life as a couple: - Start Here - the warm-up - Money - spending, saving, "yours, mine, ours" - Kids - if, when, how - Family - in-laws, boundaries, traditions - Intimacy - closeness, needs, expectations - Values - what you stand for - Conflict - how you fight and repair - Meaning - faith, purpose, whatever you each believe - Daily Life - chores, space, routines Answer together, apart. Each of you keeps the app on your own phone, answers a card privately, then reveals both answers side by side - and talks. Honest, a little vulnerable, always yours. One-time unlock. Buy it once, keep every deck forever. No subscription. Before you say "we", have the conversations that matter.

Screenshots

MOON3 screens
Vow Prep4 screens

Verdict

The call

The clearest difference is ads: Vow Prep at none against MOON's shown. MOON's advantage is update cadence (every 2 days vs every 3 weeks) and iOS requirement (12.0 vs 18.6). On price, 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

Both are free to download. MOON sells 1 in-app purchase, starting at $29.99 per year and Vow Prep sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

MOON ships an update every 2 days, Vow Prep every 3 weeks. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
MOON versus Vow Prep: the parameters behind the verdict, then further details
ParameterMOONVow Prep
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 2 days — betterEvery 3 weeks
AdsYesNo — better
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better18.6
Further details — not scored
Size129 MB85 MB
Age rating4+12+
Developer淞阁 于Thanh My DUONG

In-app purchases

1 purchases

MOON

Subscriptions1
  • 年度会员3 Days trial$29.991 Year
1 purchases

Vow Prep

One-time1
  • Vow Prep Premium$6.99

Questions

Is MOON free?
MOON is free to download, with in-app purchases available.
Is Vow Prep free?
Vow Prep is free to download, with in-app purchases available.
Do MOON or Vow Prep have ads?
MOON shows ads; Vow Prep does not.
Which is updated more often, MOON or Vow Prep?
MOON ships an update every 2 days, and Vow Prep every 3 weeks. Most recently, MOON was updated on November 8, 2026 and Vow Prep on October 31, 2026.

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