Comparison

Retrace vs 同频sync

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

Head to head
About

Retrace

This app automatically tracks your daily activities and location to create a personal history. It offers smart analysis of your past, integrates with health data, and provides reports on time allocation. Designed with privacy in mind, it requires no sign-in.

Highlights
  • Automatic activity tracking
  • Smart life analysis
  • Health integration (Apple Health)
  • Comprehensive time allocation reports
  • Privacy-focused design
  • No sign-in required
Features
Read full description

Retrace - Your Automated Life Journal Effortlessly capture your life's journey with Retrace, the intelligent diary that writes itself. Using advanced location tracking and AI, Retrace quietly documents your daily activities, creating a rich personal history without any manual input. Key Features: • Automatic Activity Tracking - Simply carry your phone and let Retrace record where you go and how you spend your time • Smart Life Analysis - Ask natural questions about your past activities and get instant insights • Health Integration - Seamlessly sync sleep and fitness data from Apple Health. • Comprehensive Reports - Visualize your time allocation across work, sleep, entertainment and more • Privacy-Focused Design - No sign-in necessary, ensuring exclusive access to your data. Perfect for: • Understanding your daily patterns • Tracking time management • Preserving life memories • Personal productivity insights Let Retrace tell your life story, automatically written every day. "VIP Membership Auto-Subscription / Lifetime Membership Service Information" • Subscription Services: a) VIP Monthly Membership (1 month) b) VIP Annual Membership (12 months) c) VIP Lifetime Membership (valid for life) • For specific subscription prices, please refer to the in-app subscription page. • Payment: After the user confirms the purchase, the payment will be charged to the iTunes account. • Renewal: For accounts with recurring monthly membership, Apple iTunes will deduct the fee within 24 hours before the expiration date. Upon successful deduction, the subscription period will be extended. • Canceling Subscription: To cancel auto-renewal, please manually turn off the auto-renewal feature in iTunes / Apple ID settings at least 24 hours before the current subscription expires. Select the corresponding subscription item to cancel. • Auto-Renewal: The Apple iTunes account will be charged within 24 hours before the expiration date. Upon successful deduction, the subscription period will be extended for one cycle. Privacy Policy: https://deergo.app/deergo/privacy.html User Agreement: https://deergo.app/deergo/agreement.html EULA: https://deergo.app/deergo/eula.html

About

同频sync

Features
Read full description

同频是一款专属于情侣的私密共创工具。不是记录恋爱,而是一起创造恋爱。 · 同频首页:照片墙 + 无限画布,把你们的日常变成一幅共同作品 · 日常聊天:只属于你们两个人的私密对话,双向实时同步 · 足迹地图:点亮一起去过的地方,拼出你们的地图 · 和解舱:冷战时的冷静计时与三词沟通,让吵架也有结构 · 时光胶囊:写给未来的你们,到日子自动开启 · 心情打卡与月度报告:看见这段关系正在发生什么 所有内容仅限绑定配对的两名用户之间可见,不提供公开社交。 使用条款(EULA):https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Retrace4 screens
同频sync4 screens

Verdict

The call

Retrace and 同频sync 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. Retrace sells 4 in-app purchases, starting at $5.99 per month and 同频sync sells 6 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Retrace ships an update every 2 days, 同频sync every 3 days. The most recent releases landed on November 8, 2026 and October 29, 2026 respectively.

ScorecardNo meaningful differences
Retrace versus 同频sync: the parameters behind the verdict, then further details
ParameterRetrace同频sync
PriceFreeFree
Rating4.0 (4 ratings) — better—
Number of ratings4 — better—
Update frequencyEvery 2 days — betterEvery 3 days
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS18.017.0 — better
Further details — not scored
Size79 MB30 MB
Age rating4+4+
Developer美群 唐磊 董

In-app purchases

4 purchases

Retrace

Subscriptions3
  • Monthly$5.991 Month
  • Yearly3 Days trial$29.991 Year
  • Yearly (Standard)$59.991 Year
One-time1
  • Lifetime membership$129.99
6 purchases

同频sync

Subscriptions2
  • 同频pro月度会员$1.991 Month
  • 同频 Pro年度会员$19.991 Year
One-time4
  • 同频 Pro 固定期限会员(1年)$9.99
  • 同频 Pro 固定期限会员(2年)$22.99
  • 同频 Pro 固定期限会员(3年)$29.99
Show 1 more
  • 同频sync终身会员$39.99

Questions

Is Retrace free?
Retrace is free to download, with in-app purchases available.
Is 同频sync free?
同频sync is free to download, with in-app purchases available.
Do Retrace or 同频sync have ads?
Neither Retrace nor 同频sync shows ads.
Which is updated more often, Retrace or 同频sync?
Retrace ships an update every 2 days, and 同频sync every 3 days. Most recently, Retrace was updated on November 8, 2026 and 同频sync on October 29, 2026.

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